Focus | Definition of Focus by Merriam-Webster play \ˈfō-ˌsī also -ˌkī\ also focuses 1a : a point at which rays (as of light, heat, or sound) converge or from which they diverge or appear to diverge; specifically : the point where the geometrical lines or their prolongations conforming to the rays diverging from or converging toward another point intersect and give rise to an image after reflection by a mirror or refraction by a lens or optical systemb : a point of convergence (see convergence 1) of a beam of particles (as electrons) 2a : focal length b : adjustment for distinct vision; also : the area that may be seen distinctly or resolved into a clear imagec : a state or condition permitting clear perception or understanding <tried to bring the issues into focus>d : direction 6c <the team lost focus> 3 : one of the fixed points that with the corresponding directrix defines a conic section 4 : a localized area of disease or the chief site of a generalized disease or infection 5a : a center of activity, attraction, or attention <the focus of the meeting was drug abuse> <put immigration into focus as

 a hot topic for commentators>b : a point of concentration 6 : the place of origin of an earthquake or moonquake 7 : directed attention : emphasis <The focus is on helping the homeless.> focusless What is the plural of focus?

What is the plural of focus? What's the plural form of focus? Here's the word you're looking for. Answer Foci | Define Foci at Dictionary.com foci [foh-sahy, -kahy] /ˈfoʊ saɪ, -kaɪ/ Spell [foh-sahy, -kahy] /ˈfoʊ saɪ, -kaɪ/ (Show IPA) 1. a central point, as of attraction, attention, or activity: The need to prevent a nuclear war became the focus of all diplomatic efforts. 2. Physics. a point at which rays of light, heat, or other radiation meet after being refracted or reflected. 3. Optics. the focal point of a lens, on which rays converge or from which they deviate. the focal length of a lens; the distance from a focal point to a corresponding principal plane. the clear and sharply defined condition of an image. the position of a viewed object or the adjustment of an optical device necessary to produce a clear image: in focus; out of focus. 4. Geometry.

(of a conic section) a point having the property that the distances from any point on a curve to it and to a fixed line have a constant ratio for all points on the curve. 5. Geology. the point of origin of an earthquake. 6. Pathology. the primary center from which a disease develops or in which it localizes. verb (used with object), focused, focusing or (especially British) focussed, focussing. 7. to bring to a focus or into focus; cause to converge on a perceived point: to focus the lens of a camera. 8. to concentrate: to focus one's thoughts; to focus troop deployment in the east. verb (used without object), focused, focusing or (especially British) focussed, focussing. 9. to be or become focused: My eyes have trouble focusing on distant objects. 10. to direct one's attention or efforts: Students must focus in class. Origin of focus Focuses | Define Focuses at Dictionary.com [foh-sahy, -kahy] /ˈfoʊ saɪ, -kaɪ/ (Show IPA) 1.

a central point, as of attraction, attention, or activity: The need to prevent a nuclear war became the focus of all diplomatic efforts. 2. Physics. a point at which rays of light, heat, or other radiation meet after being refracted or reflected. 3. Optics. the focal point of a lens, on which rays converge or from which they deviate. the focal length of a lens; the distance from a focal point to a corresponding principal plane. the clear and sharply defined condition of an image. the position of a viewed object or the adjustment of an optical device necessary to produce a clear image: in focus; out of focus. 4. Geometry. (of a conic section) a point having the property that the distances from any point on a curve to it and to a fixed line have a constant ratio for all points on the curve. 5. Geology. the point of origin of an earthquake. 6. Pathology. the primary center from which a disease develops or in which it localizes. verb (used with object), focused, focusing or (especially British) focussed, focussing. 7. to bring to a focus or into focus; cause to converge on a perceived point: to focus the lens of a camera.

8. to concentrate: to focus one's thoughts; to focus troop deployment in the east. verb (used without object), focused, focusing or (especially British) focussed, focussing. 9. to be or become focused: My eyes have trouble focusing on distant objects. 10. to direct one's attention or efforts: Students must focus in class.

Origin of focus focus - definition of focus in English | Oxford Dictionaries Definition of focus in English: focus 1The centre of interest or activity: ‘this generation has made the environment a focus of attention’ More example sentences ‘It's pretty hard to focus on issues beyond oneself, if the primary focus is the next notch on the bed frame.’ ‘We believe our evaluation to be rigorously designed, with a defined focus and clear objectives.’ ‘The relationship between spirituality and medicine has been the focus of considerable interest in recent years.’ ‘Let me focus on Islam in particular, since it is so much the focus of current events and thinking.’ ‘It was disappointing to see that the focus of her letter concentrated on the negative aspects and did not paint the full picture.’ ‘It's easiest to focus on hobbies and favorite interests, although food can also be the focus of the basket.’ ‘Creating awareness of other cultures was an important focus of this project.’ ‘It is clear that New Zealand needs new leadership and a new focus.’ ‘Likewise, the securing of ownership of Hearts has been the focus of interest in the Edinburgh club.’ ‘We keep our focus by concentrating on efforts on the goods and services we are strongest in.’ ‘Another reason can be given for the differing focus

 of Jewish interest in biblical theology.’ ‘We focus on parentage because it is the primary focus of published literature and it is the easiest level of ancestry to understand.’ ‘But if it keeps a clear focus it might achieve a way forward for our embattled province.’ ‘But combine it with a programme that lacks a clear focus and Cork's year in the cultural spotlight is already looking shaky.’ ‘The RFU's ‘Impact’ strategy will be the focus of all activity to increase participation.’ ‘Focus on the other festivities and don't make food the focus of the evening.’ ‘Frequent shifts in the proposed focus of the fund suggest considerable contention behind the scenes.’ ‘He concentrated on finding his focus and ignoring everything else as the voice bombarded him with words.’ ‘Using the pain in both wrists as a focus, he concentrated his distaste directly on the man before him.’ ‘Once you have a clear focus, gather the right team around you to get the job done.’ Synonyms centre, focal point, central point, centre of attention, hub, pivot, nucleus, heart, cornerstone, linchpin, kingpin, bedrock, basis, anchor, backbone, cynosure 1.1 An act of concentrating interest or activity on something: ‘our

 focus on the customer's requirements’ More example sentences ‘The focus has been on extensive training programs to build the work force, he reports.’ ‘I just kept my focus and concentrated on striking as much as I could; I didn't worry about what Wendy was doing.’ ‘The viewer has to have a greater focus, a greater concentration, to be overwhelmed by a work of visual art or literature.’ ‘All my focus is concentrated on the back that's slowly going further away from me.’ ‘Yelina shifted her focus and began concentrating on her breathing.’ ‘I relish the hours when my entire focus isn't concentrated on breathing.’ ‘Jesse refused to meet her eyes, his focus concentrating on her silver hoop earrings.’ ‘Keep your entire focus of concentration on the muscles that you're stretching and how they feel at that moment.’ ‘To be charitable, perhaps his paranoid focus on who'd been criticising Latham obscured his focus.’ ‘But James would also narrow the focus to concentrate solely on the moral gains of unrequited love.’ ‘He concentrated, pulling his focus inward and trying to see if there was something wrong inside that would make him lose control.’ ‘Focus on your own feelings and share them with your partner, so you won't lose the focus of

 your own body.’ ‘I concentrated all of my focus into my magic as I formed a fireball in my hand.’ ‘The breakup ruined my concentration, my focus, my ambition at the company.’ ‘Another attack also failed but it served a purpose of concentrating the focus of the Japanese on these torpedo squadrons.’ ‘A line-man likes to narrow his focus and concentrate on his assignments late in the week.’ ‘Our focus concentrated on those clutch sizes thought to be vulnerable to the spread of siblicidal behavior.’ Synonyms emphasis, accent, priority, attention, concentration subject, theme, concern, subject matter, topic, issue, question, text, thesis, content, point, motif, thread Example sentences ‘The geographic point directly above the focus is called the earthquake epicenter.’ ‘This result strongly agrees with the upward migration of seismic foci in the volcanic edifice, which has been found to precede recent flank eruptions.’ 1.3Medicine The principal site of an infection or other disease.

Example sentences ‘In addition, a microscopic focus of transitional cell carcinoma was seen adjacent to the main tumor.’ ‘There was extensive embolization to the brain and multiple foci of Aspergillus infection in kidneys and adrenal glands.’ ‘Multiple foci of infection, several millimeters in diameter, were seen in many organs.’ ‘The macroscopically apparent thrombosed vessels in case 3 contained tumor emboli and multiple foci of infarction.’ ‘An identifiable focus of primary infection should also be addressed when possible.’ 2[mass noun] The state or quality of having or producing clear visual definition: ‘his face is rather out of focus’ figurative ‘the incident brought her feelings for Alexander sharply into focus’ More example sentences ‘The result is blurry and dark, often out of focus.’ ‘Shallow depth of field traps the eye in layers of information, in and out of focus.’ ‘A specially shaped camera lens and processing method to ensure images are always in focus has been developed.’ ‘The fiber was brought into focus, and the bead was manipulated into the same focal plane.’ ‘It may be grainy and out of focus, but I quite like that.’ ‘My eyes are aching and squinting; my book is going

 in and out of focus.’ ‘There were rumours of a new girlfriend, and the tabloid was interested in any picture, however badly exposed or out of focus.’ ‘Your face is frozen to an oval miniature, glistening, out of focus.’ ‘It just looks out of focus but its still watchable, like a second generation vhs copy (without the picture roll and wigged out colour).’ ‘When she finally did open them, everything blurred out of focus, then came in clear.’ ‘So nothing is in the shadows, nothing's out of focus.’ ‘So, the scientist-as-detective has been present right from the start of this century, and it's come in and out of focus.’ ‘I'm definitely one of those people who hears most music as a soundtrack to a film going on somewhere in my head, usually deeply out of focus.’ ‘Even the smallest amateur telescope will clearly show the rings of Saturn, provided it is in focus.’ ‘The room was spinning, and things kept sliding in and out of focus.’ ‘Artifacts are plentiful, and making matters worse, some scenes were unintentionally shot out of focus.’ ‘It's only to be expected that most of the pictures are not of the highest quality, often out of focus

 or a bit blurred.’ ‘The camera was so out of focus at the start that the credits were illegible.’ ‘Jani gasped, and her brown eyes lost their focus as she concentrated.’ Synonyms blurred, unfocused, indistinct, blurry, fuzzy, hazy, misty, cloudy, foggy, fogged, shadowy, smoky, faint unclear, vague, indefinite, obscure, lacking definition, ill-defined, nebulous woolly, muzzy, bleary sharp, crisp, distinct, clear-cut, clear, well defined, well focused focal point, point of convergence another term for focal point Example sentences ‘Once you pinpoint your focus, it's time to do more homework about the industries and companies in which you want to find work.’ ‘With respect to the definition of business purpose and business mission, there is only one such focus, one starting point.’ ‘Underrepresented middle-school children are the focus of a new optics outreach program.’ ‘They primarily felt that education is a necessary and central focus for building a strong nation.’ ‘Why has religion been such a central preoccupation and focus of debate in political science over the last 20 years?’ ‘I don't value a more male focus above more female focus.’ ‘Her entire

 focus was concentrated on the small object which rested at the exact center of the room, her one and only focal point.’ ‘Breman's central focus is on the working poor at the bottom of Gujarat's society.’ ‘While Zippy has the attention span of a goldfish, his wife has the focus of an electron microscope.’ ‘Hence, the character of these variables is one central focus of our current research into OS projects.’ ‘Their focus was always upon the general rather than the particular.’ ‘Yet, an authentic transgenerational focus radiating from a cultural lens has been lacking.’ ‘The use of collinear beam geometry facilitates the alignment of the overlap of the two foci and ensures high image quality.’ ‘The central and overriding focus of this project is dealing with racism face-to-face.’ ‘As a result, the current focus for tunable lasers is on circuit-switched applications.’ ‘The probability for such an event occurring is only significant at the plane of focus, where photon flux is the highest.’ ‘The focus vanished and the blaster returned to room temperature.’ ‘Angus has composed the motifs in defined coloured areas with no central focus.’ ‘The case story is often the immediate or central focus of the consultation.’ ‘The gentleman moved his focus to the

 intersection between the main and back halls that led to the gardens.’ 2.2[count noun] The point at which an object must be situated with respect to a lens or mirror for an image of it to be well defined.

2.3[count noun] A device on a lens which can be adjusted to produce a clear image. Example sentences ‘Focusing is similar to a traditional roof prism binocular with the right ocular adjustable and a center focus knob.’ ‘He adjusts the focus of the Carl Zeiss 120 mm macro lens, which allows him to work very close up.’ ‘The focus can be adjusted slightly in order to sharpen up different parts of the image corresponding to objects at different depths in the scene.’ ‘He adjusted the focus of the lamp and watched Clark's face contort.’ ‘The microscope has a motorized focus, allowing a minimum step resolution of 25 nm.’ ‘These lenses adjust their focus with a patient's eye muscles to give them seamless near or distance vision.’ ‘Focus on the subject and use the focus lock facility of your camera.’ ‘Katsukoii slowly turned a knob, which indicated that she was adjusting the focus.’ ‘Focus on the subject and keep your finger depressed on the focus lock.’ 3Geometry One of the fixed points from which the distances to any point of a given curve, such as an ellipse or parabola, are connected by a linear relation.

Example sentences ‘A feed system is placed with its phase center at the focus of the parabola.’ ‘Well, he discovered, in the elliptical function, that the Sun was located at one of the two foci of the relevant ellipse.’ ‘The focus and directrix of a parabola were considered by Pappus.’ ‘The catenary is the locus of the focus of a parabola rolling along a straight line.’ ‘The circumcircle of a triangle formed by three tangents to a parabola, passes through the focus of the parabola.’ 4Linguistics An element of a sentence that is given prominence by intonational or other means.

verb 1Adapt to the prevailing level of light and become able to see clearly: ‘try to focus on a stationary object’ More example sentences ‘When she was able to focus, she saw two vamps descending on her.’ ‘She could only see a blur at first, but her vision focused and she was able to see clearly her surroundings.’ ‘Squinting, barely able to focus, Bill could make out Neva and the vampire called Lamkin.’ ‘Conservators using a binocular microscope could focus to see crystals and liquid droplets on the glass surfaces.’ ‘His blue eyes didn't seem to focus on any one person on the floor below him, but seemed to see all of them without focusing.’ ‘If Midori had been able to focus beyond the nemesis in front of her, she would have noticed that hope wasn't so terribly far away.’ ‘I was so nervous that I couldn't focus clearly on the road and we had to stop to change places with Rachel.’ 1.1[with object] Cause (one's eyes) to focus: ‘she focused her eyes on his face’ More example sentences ‘I focussed my eyes onto each of the signs and grumbled in annoyance.’ ‘With ears pricked, eyes

 were focused just two days later for Minstermen watchers of BBC's less sedate They Think It's All Over.’ ‘Her body stiffens as she stares at the TV, focusing her eyes, ears, heart and soul on the screen.’ ‘Feeling distinctly sick, he lay back down and focused his eyes, surveying his surroundings.’ ‘It takes a special sort of myopia to focus your eye and see the people who carry out such acts as ‘the oppressed’.’ ‘Every few metres the cat stopped and twisted its head around, focussing its yellow eyes on me, checking to see if I was still in pursuit.’ ‘I think some of the brain which attends to focussing my eyes may have leaked out.’ ‘Coughing, she focussed her eyes straight ahead of her and saw a road.’ ‘It was difficult to focus her eyes, but she saw that he was gazing intently into them.’ ‘As sales on both sides of the Atlantic in early June revealed, a good provenance works wonders in focussing a collector's eye.’ ‘She wasn't watching the music video; her eyes were focused inward, deep in thought.’ ‘I had focused my eyes, like staring through glass at something I wasn't worthy of

 having.’ ‘His eyes were focussed somewhere off in the deepening gloom.’ ‘By then, Kentou was watching it too, trying to focus his eyes onto the blurred shape, trying to make out the features of the body.’ ‘Josie's eyes weren't focussed, she wasn't even blinking.’ ‘Sitting down in a chair, I focused my eyes and senses on your face and learnt the lessons of beauty.’ ‘Franklin dug through the spoils, focusing his trained eye and pulling out the impotent mushrooms.’ ‘Kino lay back against the wall of the cave, squinting, rubbing and focusing his eyes to get the blind spots out.’ ‘The woman tries to focus her eyes, but turns them away after a second.’ ‘You struggle up in the dark, focusing your eyes in desperation on the digital alarm clock, which tells you that it's 7.30 am.’ 1.2[with object] Adjust the focus of (a telescope, camera, or other instrument): ‘they were focusing a telescope on a star’ More example sentences ‘‘Best seats in the house,’ he said, looking up and focusing his camera.’ ‘I focused my Alpha's cameras in on some of the stuff.’ ‘My heart

 is seriously about to beat out of my chest, but I focus my camera before I can change my mind and run out the back door.’ ‘Arbus focused her camera and triggered the shutter.’ ‘I smiled at the site and focused the camera and snapped a few shots.’ ‘This instrument can be focused with a wheel that moves the lens tube in and out.’ ‘For example, in one puzzle you have to focus a telescope, and to do so you have to add or remove 14 lenses.’ ‘He stopped at the top and focused his camera, snapping a few pictures of the landscape.’ ‘We went through the business of focussing the camera, and then gave her the portrait and took the 6d.’ ‘She moved closer to the kids and focused her camera.’ ‘I believe the Shuttle cameras focus everything from a few inches away until infinity.’ ‘He likened this to the chances that an out-of-focus microscope could be focused by small vs.

large random adjustments.’ ‘I focused my camera once more, and again, I went unnoticed.’ ‘Generally Brill focuses his rock-steady handheld camera on the faces of the doctors, nurses and Gillies himself.’ ‘So I focused the camera towards Em, and asked her questions.’ ‘Good thing he took the time to focus his video camera on the guy.’ ‘I have written about this many times, but modern auto-focus cameras deliver more ‘out of focus’ shots than manually focussed cameras.’ ‘‘Just look at me,’ says Juergen, focusing the camera.’ ‘Using a remote PC, the operator illuminates the target, focuses the camera, and selects the appropriate analytical tools.’ ‘Hundreds of people use auto-focus cameras and there are many people who can't focus their cameras anymore.’ Synonyms 1.3 (of rays or waves) meet at a single point.

Example sentences ‘In narrow inlets and coves, the wave can become focused or amplified, reaching tens of metres in height.’ ‘The effect can be seen in attics under ill-fitting tiled roofs, where the sun's rays are focused through chinks between the tiles.’ ‘These scatter the sun's rays, and prevent them from being focused together into a single bright point.’ ‘Because gamma rays are hard to focus into sharp images, the science team then used the X-ray telescope on Swift to determine a precise location.’ 1.4[with object] (of a lens) make (rays or waves) meet at a single point.

Example sentences ‘And they were used for starting fires by focusing the rays of the sun.’ ‘Others used a magnifying glass to focus the rays of the sun on the base of the wart.’ ‘When a lens is used to focus the sun's rays onto a piece of paper the distance of the paper from the lens is called the focal length.’ ‘When a lens system optimally focuses an incoming ray bundle, the spread of passed wavelengths is in focus at a range of points in front of, on, and behind the sensor focal plane.’ ‘Telescopes designed to collect and focus X rays from space provide that vision.’ 1.5[no object] (of light, radio waves, or other energy) become concentrated into a sharp beam.

Example sentences ‘In that time, the energy had focused and spiked beyond what I have ever felt before.’ ‘Normally a light beam will focus to a point no smaller than about the size of the light's wavelength.’ ‘The beam was directed into a customized Leica Metallux 3 microscope and focused at the sample surface via the objective lens.’ ‘Furthermore, I'm using exercises that keep that stress focused precisely where I want it.’ ‘As she watched, the moonlight began focussing, moving, searching.’ ‘It produces heat and becomes a very powerful weapon when focused into a laser beam.’ ‘The moonbeams coalesced and focused into a single glowing stream.’ ‘It works like your grappling hook did, but instead of string, it uses gravity focused into a ‘beam’ to connect it.’ ‘In the deep darkness it moved around quickly, setting up two water glasses on the table while the small light focused away from the two surrounding chairs.’ ‘Sykes saw the electricity focus in-between the two prongs that were aimed at him.’ ‘The lights ceased blinking and focused clearly on the blue floored arena masked with fake fog.’ ‘Light can focus atoms into simple patterns for etching carbon-coated gold layers.’ ‘Because the pump laser's

 light remains focused in a very narrow beam inside the fiber, it does not need to supply so many photons.’ ‘The beams of multiple lasers focused in on one point.’ ‘Designed much like a compound microscope, the electron microscope uses a beam of electrons focused through magnetic lenses.’ ‘If you have myopia, your eye is generally slightly out of round, with light rays focusing in front of the retina instead of directly on it.’ 1.6[with object] (of a lens) concentrate (light, radio waves, or energy) into a sharp beam.

Example sentences ‘An objective lens focuses the light onto a region approximately 1 mm in diameter and subsequently collects the light returning from the target.’ ‘The eye has a lens, and even ‘film’ (the retina), which detects light focused by the lens.’ ‘The long focal length portion of the lens focuses to one fovea for viewing in air; the other short focal length focuses below water.’ ‘The lens stores and then focuses light from the video that you are capturing onto the image sensor located behind it.’ ‘Humans, indeed all seeing vertebrates, have so-called simple eyes: they have a single lens system, focusing light to form one, continuous image of the outside world.’ ‘The transmitter is physically close to the optical fiber and may even have a lens to focus the light into the fiber.’ ‘These eyes use a single lens to focus images onto a light detector called a retina.’ ‘Just like a camera lens, the eye's lens focuses light to form sharp, clear images.’ ‘Lenses on cameras not only focus the image but they may magnify or diminish the apparent size of a scene.’ ‘In this sense, it can easily be seen how a camera's lens always focuses inward at least as much as it does outward toward the subject of the

 photographer's gaze.’ ‘The first students to work on the cyclotron in the lab setting modified the magnet to better focus the proton beam.’ ‘The images of the stomata were taken with the microscope focused to the narrowest part lower down in the pore.’ ‘The broadband IR beam passes through the sample chamber and is focused by a lens onto a spinning filter wheel.’ ‘Materials called photonic crystals have the potential to focus visible light, but may not work as well with microwaves.’ ‘In the simple experiment, a converging lens focuses laser light from two pinholes onto two different photodetectors.’ ‘A lens focuses this light at the back focal plane of the objective to allow collimation at the sample.’ ‘Because the zone plate focuses to a point, it must match the focal length of the camera.’ 2focus onPay particular attention to: ‘the study will focus on a number of areas in Wales’ More example sentences ‘Yet we see precisely where his mind is looking, the places on which his concentration focuses: lapels, buttons, his accomplice's hand.’ ‘Instead they should be focussing on the over-55s who could decide the result of the next election, expected in May.’ ‘More studies focusing on this

 particular problem are needed before a conclusion can be drawn.’ ‘Instead, they are learning to recognise Mia's feelings through her mood and body movements, instead of focussing on her face.’ ‘She would walk the halls ignoring everyone and only focusing on her studies and her revenge.’ ‘While he focuses on the kiwi dollar, he shows how the underlying issues are global.’ ‘What do we lose by focusing on the detail rather than discerning the underlying patterns and meanings?’ ‘As his heart started to race, he drew his attention inward, focussing on his breathing.’ ‘The study focussed on a period of time beginning four years before the casino opened and four years after.’ ‘Organisers say the emphasis of the week will be very much focused on culture.’ Synonyms emphasize, give emphasis to, stress, lay stress on, put stress on, highlight, accentuate, accent, call attention to, draw attention to, focus on, focus attention on, zero in on, spotlight, throw into relief, give prominence to, bring to the fore, foreground, bring home, point up, play up, make a feature of ‘an opportunity to focus research on the health needs of the population’ More example sentences ‘The strategic plan focuses primarily on overall goals of

 the business and defining the business.’ ‘He concentrated, focusing his thoughts on the strange impressions he was receiving.’ ‘First, the overall plot focuses upon the hubris of an upper class that thinks itself above the powers of mortality.’ ‘The concentration on punishment damages the national debate by focussing all attention on revenge.’ ‘Two of the fighting stances for each character are based on real world martial arts, and the third style focuses solely on weapon-based combat.’ ‘The two central planks to the strategy focus firstly on retaining existing customers in its core activities of mortgage lending and savings.’ ‘According to dharma, or divine law, temple worship is important because it focuses our concentration on God.’ ‘Green is the one single colour that focuses directly on the retina, so it's the easiest colour for the eye to see.’ ‘For example, the close range shield features quick, multiple hits, while the long-range weapon focuses in on powerful blows.’ ‘This retrospective focuses entirely on works held in British collections, spanning portraits, still lifes and landscapes.’ Synonyms focus - Wiktionary focus ( countable , optics) A point at which reflected or refracted rays of light converge .

The heat of sunlight at the focus of a magnifying glass can easily set dry leaves on fire.‎ ( countable , geometry) A point of a conic at which rays reflected from a curve or surface converge . ( uncountable , photography, cinematography) The fact of the convergence of light on the photographic medium. American Scientist : Not long ago, it was difficult to produce photographs of tiny creatures with every part in focus. […] A photo processing technique called focus stacking has changed that. Developed as a tool to electronically combine the sharpest bits of multiple digital images, focus stacking is a boon to biologists seeking full focus on a micron scale. Unfortunately, the license plate is out of focus in this image.‎ ( uncountable , photography, cinematography) The quality of the convergence of light on the photographic medium. During this scene, the boy’s face shifts subtly from soft focus into sharp focus.‎ I believe I can bring the high degree of focus required for this important job.‎ ( countable , seismology) The exact point of where an earthquake occurs, in three dimensions (underneath the epicentre ).

The earthquake's focus was at exactly 37 degrees north, 18 degrees south, seventy five meters below the ground.‎ (computing, graphical user interface) The indicator of the currently active element in a user interface . Text entered at the keyboard or pasted from a clipboard is sent to the component which currently has the focus.‎ (linguistics) The most important word or phrase in a sentence or passage, or the one that imparts information . foci - Wiktionary foci Inflection (stem in long/high vowel, back harmony) singular Printable version This page was last modified on 15 August 2016, at 01:11. What is the plural of focus group? What is the plural of focus group? What's the plural form of focus group? Here's the word you're looking for. Answer Focus - definition of focus by The Free Dictionary Focus - definition of focus by The Free Dictionary n. pl. fo·cus·es or fo·ci (-sī′, -kī′) 1. a. The distinctness or clarity of an image rendered by an optical system. b.

The state of maximum distinctness or clarity of such an image: in focus; out of focus. c. An apparatus used to adjust the focal length of an optical system in order to make an image distinct or clear: a camera with automatic focus. 2. a. A point at which rays of light or other radiation converge or from which they appear to diverge, as after refraction or reflection in an optical system: the focus of a lens. Also called focal point. b. See focal length . 3. a. A center of interest or activity: "Precisely how diet affects E. coli in livestock is the focus of current research" (Cindy Engel). b. Close or narrow attention; concentration: "He was forever taken aback by [New York's] pervasive atmosphere of purposefulness—the tight focus of its drivers, the brisk intensity of its pedestrians" (Anne Tyler). c. A condition in which something can be clearly apprehended or perceived: couldn't get the problem into focus. 4. Medicine The region of a localized bodily infection or disease. 5. Geology The point of origin of an earthquake. 6. Mathematics A fixed point whose relationship with a directrix determines a conic section. v.

fo·cused, fo·cus·ing, fo·cus·es or fo·cussed or fo·cus·sing or fo·cus·ses v.tr. 1. To cause (light rays, for example) to converge on or toward a central point; concentrate. 2. a. To render (an object or image) in clear outline or sharp detail by adjustment of one's vision or an optical device; bring into focus. b. To adjust (a lens, for example) to produce a clear image. 3. To direct toward a particular point or purpose: focused all their attention on finding a solution to the problem. v.intr. 1. To converge on or toward a central point of focus; be focused. 2. To adjust one's vision or an optical device so as to render a clear, distinct image. 3. To concentrate attention or energy: a campaign that focused on economic issues. [New Latin, from Latin, hearth (probably in reference to the fact that a lens or parabolic mirror can concentrate sunlight on a single point to start a fire).] fo′cus·er n.

(ˈfəʊkəs) n, pl -cuses or -ci (-saɪ; -kaɪ; -kiː) 1. (General Physics) a point of convergence of light or other electromagnetic radiation, particles, sound waves, etc, or a point from which they appear to diverge 2. (General Physics) another name for focal point 1, focal length 3. (General Physics) optics the state of an optical image when it is distinct and clearly defined or the state of an instrument producing this image: the picture is in focus; the telescope is out of focus. 4. a point upon which attention, activity, etc, is directed or concentrated 5. (Mathematics) geometry a fixed reference point on the concave side of a conic section, used when defining its eccentricity 6. (Geological Science) the point beneath the earth's surface at which an earthquake or underground nuclear explosion originates. Compare epicentre 7. (Pathology) pathol the main site of an infection or a localized region of diseased tissue vb, -cuses, -cusing, -cused, -cusses, -cussing or -cussed 8.

(General Physics) to bring or come to a focus or into focus 9. (often foll by: on) to fix attention (on); concentrate [C17: via New Latin from Latin: hearth, fireplace] ˈfocusable adj n., pl. -cus•es, -ci (-sī, -kī), n. 1. a central point, as of attention or activity. 2. a point at which rays of light, heat, or other radiation meet after being refracted or reflected. 3. a. the focal point of a lens. b. the focal length of a lens. c. the clear and sharply defined condition of an image. d. the position of a viewed object or the adjustment of an optical device necessary to produce a clear image: out of focus. 4. (of a conic section) a point having the property that the distances from any point on a curve to it and to a fixed line have a constant ratio for all points on the curve. 5. the point of origin of an earthquake. 6. the primary center from which a disease develops or in which it localizes. v.t. 7. to bring to a focus or into focus: to focus the lens of a camera.

8. to concentrate: to focus one's thoughts. v.i. [1635–45; < Latin: fireplace, hearth] fo′cus•a•ble, adj. fo·cus (fō′kəs) Plural focuses or foci (fō′sī′, fō′kī′) 1. A point at which rays of light come together or from which they appear to spread apart, as after passing through a lens. 2. The degree of clarity with which an eye or optical instrument produces an image: a telescope with excellent focus. 3. A central point or region, such as the point at which an earthquake starts. 4. Mathematics A fixed point or one of a pair of fixed points used in constructing a curve such as an ellipse, a parabola, or a hyperbola. Focus draw a bead on To aim at carefully, to line up in the sight of one’s gun; to zero in on a person or thing. The reference is to the bead or front sight of a rifle. George Catlin used the expression literally in his treatise on North American Indians (1833).

zero in on To focus one’s attention on a specific person, proposal, issue, or other matter; to aim at; to set one’s sights on. Originally, zero in referred to adjusting the sights of a gun to the zero or horizontal line so that when aimed and fired at a target, the projectile will hit it dead center. Though this meaning persists, the expression has been extended to include figurative application in various nonballistic contexts as evidenced in this example by J. N. Leonard cited in Webster’s Third: … bird-dogs zeroing in on coveys of hidden quail. focus I will have been focusing/focussing you will have been focusing/focussing he/she/it will have been focusing/focussing we will have been focusing/focussing you will have been focusing/focussing they will have been focusing/focussing Past Perfect Continuous Noun 1. focus - the concentration of attention or energy on something; "the focus of activity shifted to molecular biology"; "he had no direction in his life" engrossment , immersion , absorption , concentration - complete attention; intense mental effort particularism - a focus on something particular 2.

focus - maximum clarity or distinctness of an image rendered by an optical system; "in focus"; "out of focus" distinctness , sharpness - the quality of being sharp and clear 3. focus - maximum clarity or distinctness of an idea; "the controversy brought clearly into focus an important difference of opinion" clarity , clearness , limpidity , lucidity , lucidness , pellucidity - free from obscurity and easy to understand; the comprehensibility of clear expression 4. point - the precise location of something; a spatially limited location; "she walked to a point where she could survey the whole street" focal infection - bacterial infection limited to a specific organ or region especially one causing symptoms elsewhere 5. emphasis , accent - special importance or significance; "the red light gave the central figure increased emphasis"; "the room was decorated in shades of grey with distinctive red accents" 6. focus - a point of convergence of light (or other radiation) or a point from which it diverges point - the precise location of something; a spatially limited location; "she walked to a point where she could survey the whole street" 7.

focus - a fixed reference point on the concave side of a conic section point - the precise location of something; a spatially limited location; "she walked to a point where she could survey the whole street" Verb 1. engross , engulf , steep , soak up , immerse , absorb , plunge - devote (oneself) fully to; "He immersed himself into his studies" cerebrate , cogitate , think - use or exercise the mind or one's power of reason in order to make inferences, decisions, or arrive at a solution or judgments; "I've been thinking all day and getting nowhere" rivet - hold (someone's attention); "The discovery of the skull riveted the paleontologists" recall - cause one's (or someone else's) thoughts or attention to return from a reverie or digression; "She was recalled by a loud laugh" think - focus one's attention on a certain state; "Think big"; "think thin" zoom in - examine closely; focus one's attention on; "He zoomed in on the book" take heed , listen , hear - listen and pay attention; "Listen to your father"; "We must hear the expert before we make a decision" 2.

focus - cause to converge on or toward a central point; "Focus the light on this image" refocus - focus once again; The physicist refocused the light beam" sharpen - make (images or sounds) sharp or sharper blur - to make less distinct or clear; "The haze blurs the hills" 3. align , aline , adjust , line up - place in a line or arrange so as to be parallel or straight; "align the car with the curb"; "align the sheets of paper on the table" refocus - focus anew; "The group needs to refocus its goals" 4. adapt , conform , adjust - adapt or conform oneself to new or different conditions; "We must adjust to the bad economic situation" slur , dim , blur - become vague or indistinct; "The distinction between the two theories blurred" 5.

adjust , correct , set - alter or regulate so as to achieve accuracy or conform to a standard; "Adjust the clock, please"; "correct the alignment of the front wheels" refocus - put again into focus or focus more sharply; "refocus the image until it is very sharp" center , center on , concentrate on , focus on , revolve about , revolve around - center upon; "Her entire attention centered on her children"; "Our day revolved around our work" blear , blur - make dim or indistinct; "The fog blurs my vision" focus verb 2. fix , train , direct , aim He focused the binoculars on the boat. noun 2. focal point , heart , target , headquarters , hub , meeting place the focus of the campaign for black rights 3. attention , concern , priority , concentration IBM has shifted its focus to personal computers. out of focus blurred , obscure , unclear , fuzzy , hazy , muzzy , ill-defined , indistinct Some of the pictures are out of focus.

focus بُؤْرَه مَرْكَز مَرْكِز الإهْتِمام يُرَكِّزُ يُرَكِّز، يَوَجِّـه ohniskosoustředitsoustředit sestředstřed zájmu odak odak ayarı yapmakodak noktası odaklanmak yöneltmek chú trọngtrọng tâm focus [ˈfəʊkəs] A. N (focuses or foci (pl)) [ˈfəʊsaɪ] (gen) → foco m; [of attention] → centro m, foco m he was the focus of attention → era el centro or foco de atención to be in focus (Phot) → estar enfocado to be out of focus (Phot) → estar desenfocado B. VT [+ camera, instrument] → enfocar (on a) [+ attention] → centrar , concentrar (on en) to focus one's eyes on sth/sb → fijar la mirada en algo/algn all eyes were focussed on her → todos la miraban fijamente C.

VI to focus (on) [light] → converger (en); [heat rays] → concentrarse (en); [eyes] → fijarse (en) to focus on sth (Phot) → enfocar algo focus to be the focus of attention → être le centre d'attention (= attention) → attention f focus on sth → intérêt pour qch (PHOTOGRAPHY) [camera] → foyer m in focus [camera, telescope] → au point out of focus [camera, telescope] → pas au point to be out of focus [image] → être flou The house is out of focus in this photo → La maison est floue sur cette photo . to be in focus [image] → être net (te) out-of-focus vt Try to focus the binoculars → Essaye de mettre les jumelles au point.

to focus binoculars on sth → braquer des jumelles sur qch to focus a camera on sth → braquer un appareil photo sur qch I can't focus my eyes → Je vois trouble ., fixer son regard sur qch to focus light on sth → diriger la lumière sur qch (= concentrate) to focus attention on sb/sth → focaliser l'attention sur qn/qch to focus one's attention on sb/sth → se focaliser sur qn/qch focus on (with camera) → régler la mise au point sur The cameraman focused on the bird → Le caméraman a réglé la mise au point sur l'oiseau. (= concentrate on) → se concentrer sur Let's focus on the plot of the play → Concentrons-nous sur l'intrigue de la pièce .

focus n pl <foci> (Phys, Math, fig) → Brennpunkt m; (of storm) → Zentrum nt; (of earthquake, Med) → Herd m; in focus (camera) → (scharf) eingestellt ; photo → scharf ; to bring something into focus (lit) → etw klar or scharf einstellen ; (fig) topic → etw in den Brennpunkt rücken ; out of focus (lit, camera) → unscharf eingestellt ; photo → unscharf ; (fig) ideas → vage ; to come into focus → ins Blickfeld rücken ; to keep something in focus (lit) → etw scharf eingestellt im Suchfeld behalten ; (fig) → etw im Blickfeld behalten ; he/the new proposal was the focus of attention → er/der neue Vorschlag stand im Mittelpunkt vt instrument → einstellen (→ on auf +acc); light, heat rays → bündeln ; (fig) one’s efforts, resources, energy → konzentrieren (→ on auf +acc); to focus one’s eyes on somebody/something → den Blick auf jdn / etw r

ichten ; to focus one’s attention/mind → sich konzentrieren ; I should like to focus your attention (up)on a new problem → ich möchte Ihre Aufmerksamkeit auf ein neues Problem lenken vi (light, heat rays) → sich bündeln ; to focus on something → sich auf etw (acc) → konzentrieren ; his eyes focused on the book → sein Blick richtete sich auf das Buch ; I can’t focus properly → ich kann nicht mehr klar sehen focus 1.

n (focuses or foci (pl)) [ˈfəʊkaɪ] (gen) → fuoco ; (of attention, interest) → centro to be out of focus (Phot) → essere sfocato / a in focus → a fuoco 2. vt to focus (on) (camera, instrument, field glasses) → mettere a fuoco (su); (attention, eyes) → focalizzare (su); (light rays) → far convergere (su) 3. vi to focus (on) (light, heat, rays) → convergere (su); (person) → fissare lo sguardo (su) to focus on sth (eyes, person) → mettere a fuoco qc focus (ˈfoukəs) – plurals ˈfocuses ~foci (ˈfousai) – noun 1. the point at which rays of light meet after passing through a lens.

fokus بُؤْرَه фокус foco ohnisko der Brennpunkt fokus; brændpunkt εστία foco fookus کانون polttopiste foyer מוקד केंद्र बिंदु fokus, žarište gyújtópont titik pusat, fokus brennipunktur, fókus fuoco 焦点 초점 židinys fokuss titik pusat brandpunt brennpunkt , fokus ognisko محراق، فوکس foco focar фокус ohnisko žarišče fokus fokus, brännpunkt จุดรวมแสง odak 焦點 фокус شعاعوں یا لہروں کا نقطئہ ارتکاز giao điểm; điểm hội tụ 焦点 2. a point to which light, a look, attention etc is directed. She was the focus of everyone's attention.

fokus; toespits; alle aandag was op haar toegespits مَرْكِز الإهْتِمام център foco střed der Mittelpunkt fokus; midtpunkt επίκεντρο foco , centro tulipunkt مورد؛ مرکز keskipiste point de mire מוקד केन्द्रीय बिंदु fokus, centar fókusz pusat perhatian miðdepill, athygli centro 注目の的 관심 centras centrs perhatian brandpunt midtpunkt centrum مرکز foco focar, centru центр stred cilj središte brännpunkt, centrum จุดสนใจ odak noktası 集中點 центр وہ جگہ جہاں روشنی ، توجہ وغیرہ مرکوز کی جاۓ trung tâm; trọng tâm 集中点 verb – past tense, past participle ˈfocus(s)ed – 1. to adjust (a camera, binoculars etc) in order to get a clear picture.

Remember to focus the camera / the picture before taking the photograph.

instel; die kamera op iets instel يَضْبِطُ آلة التَصْوير фокусирам focar zaostřit scharf stellen fokusere εστιάζω enfocar fookusesse seadma تنظیم کردن tarkentaa mettre au point לְמַקֵד केंद्रित होना fokusirati, izoštriti élesre állít memfokuskan stilla linsu/fókus mettere a fuoco 焦点を合わせる 초점을 맞추다 nustatyti ryškumą nostādīt fokusā memfokuskan instellen stille inn , fokusere ogniskować د عدسیی میزان برابر کول focar a focaliza устанавливать фокус zaostriť izostriti fokusirati ställa in skärpan ปรับ (ภาพ) ให้เห็นชัดเจน odak ayarı yapmak 使聚焦 фокусувати صاف تصویر لینے ک

ے لۓ کسی کیمرہ یا دوربین وغیرہ کو ٹھیک کرنا tụ lại; điều chỉnh tiêu điểm 使聚焦 2.

to direct (attention etc) to one point. The accident focussed public attention on the danger.

vestig; aandag op iets vestig يُرَكِّز، يَوَجِّـه съсредоточавам focar soustředit konzentrieren henlede; fokusere συγκεντρώνω centrar , concentrar keskendama متمرکز کردن kohdistaa concentrer לְהִתמַקֵד साफ दिखाई देना usmjeriti u jednu točku, usredotočiti összpontosít memusatkan perhatian beina athygli concentrare , focalizzare 集中する (관심 등을) 집중시키다 sutelkti, sukoncentruoti koncentrēt (uzmanību u.tml.) menarik perhatian concentreren samle om, konsentrere skupiać متمرکزه کول focar a se concentra; a atrage atenţia сосредоточивать sústrediť osredotočiti usmeriti rikta uppmärksamheten

 เพ่งความสนใจ yöneltmek 集中注意力於 зосереджувати متوجہ کرنا tập trung (sự chú ý...) 集中注意力于 ˈfocal adjective fokaal; brandpunt بُؤْري фокусен focal ohniskový fokal fokuserende εστιακός focal keskne کانونی؛ اصلی polttopiste- focal מוֹקדִי केन्द्रीय, नाभीय žarišni gyújtó-, fókusz mengenai fokus brennidepils-; skerpu- focale 焦点の 초점의 židinio, centrinis galvenais; centrālais fokus brandpunts- fokal , brenn- ogniskowy محراقی، مرکزی focal focal фокусный ohniskový žariščen središni fokal, brännpunkts- เกี่ยวกับจุดรวมแสง odak noktasına ait 焦點的

 фокусний ماسکی thuộc về hoặc chỗ tiêu điểm 焦点的 in/out of focus giving or not giving a clear picture.

These photographs are out of focus.

fokus; uit fokus خارِج البُؤْره، صورَه غير واضِحَه на/не на фокус bem/mal focado ostrý; neostrý unscharf i fokus; ude af fokus καλοτραβηγμένος, θαμπός , κουνημένος enfocado, desenfocado terav, ebaterav واضح؛ مبهم epätarkka net ; flou לְמַקֵד स्पष्ट तस्वीर नहीं देना u fokusu, izvan fokusa éles, nem éles kép jelas; kabur (ó)skÿr, (ekki) í fókus a fuoco ; sfuocato 焦点の合っている〔いない〕 초점이 맞아(맞지 않아) ryškus, neryškus fokusā/ārpus fokusa kabur onscherp i fokus , skarp , klar; ute av fokus, uskarp

 ostry/nieostry واضح bem/mal focado clar; neclar в , не в фокусе ostrý; neostrý, zaostrený, nezaostrený oster; neoster, premaknjen izoštren/nejasan skarp/oskarp ภาพชัด / ไม่ชัด net değil 清晰，模糊 (не)сфокусований صاف تصویر ظاہر کرنا یا نہ کرنا rõ nét/lờ mờ không rõ nét 清晰，模糊 focus → مَرْكَز , يُرَكِّزُ soustředit se, střed zájmu fokus, fokusere Brennpunkt , konzentrieren (sich) εστία , εστιάζω enfocar , foco keskipiste, kohdistaa centre , se concentrer fokus, usredotočiti se centro , concentrarsi 焦点, 焦点を合わせる 초점, 초점을 맞추다 aandacht hebben voor , focus fokus , fokusere ognisko

 , skupić focar , foco фокус , фокусировать(ся) fokus, fokusera จุดเน้น, มุ่งเน้น odak , odaklanmak chú trọng, trọng tâm 焦点 , 集中 fo·cus

Question: What is the plural of focus?
Answer: Foci