filter
Language: English
Part of speech: noun
Pronunciation: ipa: /ˈfɪltə/
ipa: /ˈfɪltɚ/
rhymes: -ɪltə(ɹ)
homophone: philter
Forms: form: filters
Etymology: From Middle English filtre, from Medieval Latin filtrum (compare also Old French feutre (“felt; filter”)), from Frankish *filtir, from Proto-West Germanic *felt. See felt. Doublet of phin.
Senses: examples: text: Then add four drops of crocodile semen, and pass the mixture through a filter.
ref: 1961, Harry E. Wedeck, Dictionary of Aphrodisiacs, New York: The Citadel Press, page 152:
glosses: A device which separates a suspended, dissolved, or particulate matter from a fluid, solution, or other substance; any device that separates one substance from another.
glosses: Electronics or software that separates unwanted signals (for example noise) from wanted signals or that attenuates selected frequencies.
examples: text: He runs an email filter to catch the junk mail.
text: In America alone, people spent $170 billion on “direct marketing”—junk mail of both the physical and electronic varieties—last year. Yet of those who received unsolicited adverts through the post, only 3% bought anything as a result. If the bumf arrived electronically, the take-up rate was 0.1%. And for online adverts the “conversion” into sales was a minuscule 0.01%. That means about $165 billion was spent not on drumming up business, but on annoying people, creating landfill and cluttering spam filters.
ref: 2013 May 25, “No hiding place”, in The Economist, volume 407, number 8837, page 74:
glosses: Any item, mechanism, device, or procedure that acts to separate or isolate.
examples: text: He's got no filter, and he's always offending people as a result.
glosses: Self-restraint in speech.
examples: text: The collection of cofinite subsets of ℝ is a filter under inclusion: it includes the intersection of every pair of its members, and includes every superset of every cofinite set.
text: If (1) the universal set (here, the set of natural numbers) were called a "large" set, (2) the superset of any "large" set were also a "large" set, and (3) the intersection of a pair of "large" sets were also a "large" set, then the set of all "large" sets would form a filter.
topics: mathematics
order-theory
sciences
glosses: A non-empty upper set (of a partially ordered set) which is closed under binary infima (a.k.a. meets).
topics: arts
hobbies
lifestyle
photography
glosses: A translucent object placed in the light path of a camera to remove certain wavelengths (colors), or a computer program that simulates such an effect.
examples: text: He don't need no filter posting pictures!
ref: 2013, Patent Pending, “All-Star Hipster”, in Brighter:
qualifier: social media
glosses: An appearance-altering digital image effect.
Hyponyms: air filter
Christiansen filter
cigarette filter
fuel filter
glare filter
Great Filter
intent filter
oil filter
Sobel filter
sun filter
ultrafilter
Derived terms: word: alpha-beta filter
word: Bayer filter
word: biofilter
word: bitfilter
word: Bloom filter
word: bogon filter
word: bozo filter
word: Butterworth filter
word: chemofilter
word: clear-filter
word: comb filter
word: diafilter
word: diesel particulate filter
word: dust filter
word: electrofilter
word: filter bank
word: filter bed
word: filter bubble
word: filter cake
word: filter card
word: filter coffee
word: filter down
word: filter feeder
word: filter-feeder
word: filter funnel
word: filtergram
word: filter in turn
word: filter lane
word: filterless
word: filterlike
word: filterman
word: filtermat
word: filter pad
word: filter paper
word: filterplate
word: filterset
word: filter tip
word: filtertop
word: filter tube
word: filter up
word: filterware
word: filtrand
word: filtrate
word: Gabor filter
word: Gooch filter
word: Great Filter
word: haemofilter
word: hemofilter
word: highpass filter
word: interference filter
word: interfilter
word: intrafilter
word: Kalman filter
word: killfilter
word: leukofilter
word: LMS filter
word: microfilter
word: minifilter
word: Mitchell-Netravali filter
word: modal filter
word: multifilter
word: nanofilter
word: nonfilter
word: notch filter
topics: order-theory
mathematics
sciences
word: ultrafilter
word: Ormsby filter
word: overfilter
word: pop filter
word: portafilter
word: refilter
word: Savitzky-Golay filter
word: subfilter
word: superfilter
word: underfilter
word: unfilter
word: Wiener filter
word: wordfilter