# linear
## English
### Etymology

From Latin līneāris, from līnea (“line”) + -āris (adjectival suffix), equivalent to line +‎ -ar. Doublet of lineal.

### Pronunciation

* IPA: /ˈlɪn.i.əɹ/
** Audio (US):(file)
* (Indic) IPA: /ˈliːnijə(ɾ)/

### Adjective

polynomial degrees :
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linear (comparative more linear, superlative most linear)
* Having the form of a line; straight or roughly straight; following a direct course.
** 2019, Li Huang, James Lambert, “Another Arrow for the Quiver: A New Methodology for Multilingual Researchers”, in Journal of Multilingual and Multicultural Development, →DOI, page 4:The route taken does not have to be a perfectly straight line, just so long as it is linear and is followed consistently for each transect taken.
* Of or relating to lines.
* Made, or designed to be used, in a step-by-step, sequential manner.
    a linear medium
* (botany, of leaves) Long and narrow, with nearly parallel sides.
* (mathematics) (of polynomials or polynomial equations)
** (of a polynomial) Having degree one; that is, being of the form $a_{1}x_{1}+a_{2}x_{2}+\cdots +a_{n}x_{n}+b$, where each $x_{i}$ is a variable. See also Linear polynomials on Wikipedia.Wikipedia
    $4x+5y+{\frac {1}{2}}z$ is a linear polynomial, but $4xy+{\frac {1}{2}}z$ and $4x+z^{2}$ are not.
** (of a polynomial equation) Involving only linear polynomials. See also Linear equation on Wikipedia.Wikipedia
    The graph of the linear equation $y=ax+b$ is a straight line with slope $a$ and y-intercept $b$
* (mathematics) (of functions or maps)
** (of a function between vector spaces) An additive, homogeneous mapping; that is, a function $f:V\to W$ is linear if it distributes over vector addition ($f(\mathbf {v} +\mathbf {w} )=f(\mathbf {v} )+f(\mathbf {w} )$) and respects scalar multiplication ($f(c\mathbf {v} )=cf(\mathbf {v} )$). If $V$ and $W$ are vector spaces over a field $K$, $f$ may also be called a $K$-linear map. See also linear map on Wikipedia.Wikipedia
    The map $f:\mathbb {R} ^{3}\to \mathbb {R} ^{2}$ taking $(x,y,z)\mapsto (x+y+z,x-y+3z)$ is a linear map.
** (of a function over a module) A module homomorphism; that is, a group homomorphism that commutes with scalar multiplication. See also Module homomorphism on Wikipedia.Wikipedia
* (physics) A type of length measurement involving only one spatial dimension (as opposed to area or volume).
    a linear meter

#### Synonyms

* linelike

#### Antonyms

* nonlinear

#### Coordinate terms

* (pertaining to length): areal, spacial, spatial
* (one-dimensional unit): cubic, square

#### Derived terms

* antilinear
* basolinear
* bilinear
* circumlinear
* colinear
* collinear
* crosslinear
* curvilinear
* general linear group
* hyperlinear
* interlineal
* interlinear
* isolinear
* lineal
* linear algebra
* linear algebraic
* linear algebraic group
* linear channel
* linear combination
* linear congruential generator
* linear density
* linear dependence
* linear elasticity
* linear equation
* linear foot
* linear form
* linear function
* linear functional
* linear group
* linear independence
* linearise
* linearism
* linearithmic
* linearity
* linearization
* linearize
* linear logic
* linearly
* linear map
* linear meter, linear metre
* linear motor
* linearoid
* linear operator
* linear order
* linear pair
* linear park
* linear perspective
* linear programming
* linear regression
* linear relative
* linear space
* linear span
* linear subspace
* linear sum
* linear system
* linear television
* linear time
* linear time-invariant
* linear time-varying
* linear transformation
* linear triplet
* lineartuberculate
* linear TV
* log-linear
* matrilinear
* monolinear
* multilinear
* non-linear
* non-linear text
* numerical linear algebra
* ortholinear
* paralinear
* patrilinear
* piecewise linear
* piecewise-linear
* plurilinear
* polylinear
* positive linear functional
* pseudolinear
* quadrilinear
* quasilinear
* rectified linear unit
* semilinear
* sesquilinear
* special linear group
* spherical linear interpolation
* sublinear
* superlinear
* supralinear
* translinear
* trilinear
* ultralinear
* unilinear
* vertilinear

#### Translations

    The translations below need to be checked and inserted above into the appropriate translation tables. See instructions at Wiktionary:Entry layout § Translations.

### Noun

linear (plural linears)
* (radio slang) Ellipsis of linear amplifier.

### References

* linear on Wikipedia.Wikipedia
* “linear”, in OneLook Dictionary Search.
* William Dwight Whitney, Benjamin E[li] Smith, editors (1911), “linear”, in The Century Dictionary […], New York, N.Y.: The Century Co., →OCLC.

### Anagrams

* Arline, Erlian, Irelan, Lanier, aliner, enrail, lanier, larine, nailer, renail

## Catalan
### Etymology

Borrowed from Latin līneāris.

### Pronunciation

* IPA: (Central) [li.neˈar]
* IPA: (Balearic) [li.neˈa]
* IPA: (Valencia) [li.neˈaɾ]

### Adjective

linear m or f (masculine and feminine plural linears)
* linear
    Synonym: lineal

#### Related terms

* línia

### Further reading

* “linear” in Diccionari de la llengua catalana, segona edició, Institut d’Estudis Catalans.
* “linear”, in Gran Diccionari de la Llengua Catalana, Grup Enciclopèdia Catalana, 2025
* “linear” in Diccionari normatiu valencià, Acadèmia Valenciana de la Llengua.
* “linear” in Diccionari català-valencià-balear, Antoni Maria Alcover and Francesc de Borja Moll, 1962.

## Indonesian
### Etymology

Internationalism, borrowed from Dutch lineair (“linear”), from French linéaire, from Latin līneāris.

### Pronunciation

* IPA: /liˈnɛar/
* Rhymes: -ar, -r
* Hyphenation: li‧nè‧ar

### Adjective

linèar
* alternative spelling of linièr (“linear”)

### References

* ↑ Nicoline van der Sijs (2010) Nederlandse woorden wereldwijd‎, Den Haag: Sdu Uitgevers, →ISBN, →OCLC

### Further reading

* “linear” in Kamus Besar Bahasa Indonesia, Jakarta: Agency for Language Development and Cultivation – Ministry of Education, Culture, Research, and Technology of the Republic of Indonesia, 2016.

## Portuguese
### Etymology

Learned borrowing from Latin līneāris.

### Pronunciation

* (Brazil) IPA: /li.neˈaʁ/ [li.neˈah]
* (Brazil) IPA: /li.neˈaʁ/ [li.neˈah]
** (São Paulo) IPA: /li.neˈaɾ/
** (Rio de Janeiro) IPA: /li.neˈaʁ/ [li.neˈaχ]
** (Southern Brazil) IPA: /li.neˈaɻ/
* (Portugal) IPA: /liˈnjaɾ/
* (Portugal) IPA: /liˈnjaɾ/
** (Southern Portugal) IPA: /liˈnja.ɾi/
* Hyphenation: li‧ne‧ar

### Adjective

linear m or f (plural lineares)
* linear (having the form of a straight line)
* (mathematics) linear (being a first-degree polynomial)
* linear (made in a step-by-step, logical manner)

#### Related terms

* linha

### Further reading

* “linear”, in Dicionário Priberam da Língua Portuguesa (in Portuguese), Lisbon: Priberam, 2008–2025

## Romanian
### Adjective

linear m or n (feminine singular lineară, masculine plural lineari, feminine and neuter plural lineare)
* Alternative form of liniar

#### Declension
## Spanish
### Pronunciation

* IPA: /lineˈaɾ/ [li.neˈaɾ]
* Rhymes: -aɾ
* Syllabification: li‧ne‧ar

### Etymology 1

From Latin lineāris.

#### Adjective

linear m or f (masculine and feminine plural lineares)
* (botany) linear

##### Derived terms

* perspectiva linear

### Etymology 2

From Latin lineāre.

#### Verb

linear (first-person singular present lineo, first-person singular preterite lineé, past participle lineado)
* to line
* to outline, mark out

##### Conjugation

$^1$Mostly obsolete, now mainly used in legal language. $^2$Argentine and Uruguayan voseo prefers the tú form for the present subjunctive.

##### Derived terms

* lineamiento

### Further reading

* “linear”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8, Royal Spanish Academy [Spanish: Real Academia Española], 2024 December 10