Linearとは 意味・読み方・使い方

語源

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

発音

• (英国発音) IPA: /ˈlɪni.ə/
• (米国発音) IPA: /ˈlɪni.əɹ/
• (Indic) IPA: /ˈlinɪjə(r)/
• 韻: -ɪniə(ɹ)

形容詞

linear (comparative more linear, superlative most linear)

1. 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.

2. Of or relating to lines.

   Synonym: lineal

3. Made, or designed to be used, in a step-by-step, sequential manner.

   a linear medium

4. (botany, of leaves) Long and narrow, with nearly parallel sides.
5. (mathematics) (of polynomials or polynomial equations)
   1. (of a polynomial) Having degree one; that is, being of the form ${\displaystyle a_{1}x_{1}+a_{2}x_{2}+\cdots +a_{n}x_{n}+b}$, where each ${\displaystyle x_{i}}$ is a variable. See also Linear polynomials on Wikipedia.Wikipedia

      ${\displaystyle 4x+5y+{\frac {1}{2}}z}$ is a linear polynomial, but ${\displaystyle 4xy+{\frac {1}{2}}z}$ and ${\displaystyle 4x+z^{2}}$ are not.

   2. (of a polynomial equation) Involving only linear polynomials. See also Linear equation on Wikipedia.Wikipedia

      The graph of the linear equation ${\displaystyle y=ax+b}$ is a straight line with slope ${\displaystyle a}$ and y-intercept ${\displaystyle b}$

6. (mathematics) (of functions or maps)
   1. (of a function between vector spaces) An additive, homogeneous mapping; that is, a function ${\displaystyle f:V\to W}$ is linear if it distributes over vector addition ( ${\displaystyle f(\mathbf {v} +\mathbf {w} )=f(\mathbf {v} )+f(\mathbf {w} )}$) and respects scalar multiplication ( ${\displaystyle f(c\mathbf {v} )=cf(\mathbf {v} )}$). If ${\displaystyle V}$ and ${\displaystyle W}$ are vector spaces over a field ${\displaystyle K}$, ${\displaystyle f}$ may also be called a ${\displaystyle K}$-linear map. See also linear map on Wikipedia.Wikipedia

      The map ${\displaystyle f:\mathbb {R} ^{3}\to \mathbb {R} ^{2}}$ taking ${\displaystyle (x,y,z)\mapsto (x+y+z,x-y+3z)}$ is a linear map.

   2. (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
7. (physics) A type of length measurement involving only one spatial dimension (as opposed to area or volume).

   a linear meter

8. (Discuss this sense) (media, of video and audio) Delivered or delivering on a fixed schedule, as opposed to on-demand. [From 1980s]

   Synonyms: broadcast, tune-in

   Antonyms: streaming, on-demand, non-linear

   linear TV, linear content, linear video, linear radio

   Linear television is dead or, at least, declining.

   Linear television includes traditional over-the-air broadcasting, as well as much cable and satellite broadcasting.

   • 2004, Wolfgang Hoeg, Thomas Lauterbach, editors, Digital Audio Broadcasting: Principles and Applications of Digital Radio, John Wiley & Sons, →ISBN, page 186:

     Linear radio relates to our well-known tune-in radio, where the listener depends on the programmers schedule. In non-linear radio applications, the listener is able to choose previously broadcast audio pieces, which are held in local storage of the receiver (“mailbox”).

同意語

• linelike

反意語

• nonlinear

等位語

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

派生語

名詞

linear (plural linears)

1. (radio slang) Ellipsis of linear amplifier.

参照

• 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.

アナグラム

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