linear

adjective

lin·​e·​ar ˈli-nē-ər 

1

a(1)

: of, relating to, resembling, or having a graph that is a line and especially a straight line : straight

(2)

: involving a single dimension

b(1)

: of the first degree with respect to one or more variables

(2)

: of, relating to, based on, or being linear equations, linear differential equations, linear functions, linear transformations, or linear algebra

c(1)

: characterized by an emphasis on line

linear art

(2)

: composed of simply drawn lines with little attempt at pictorial representation

linear script

d

: consisting of a straight chain of atoms

a linear molecule

2

: elongated with nearly parallel sides

linear leaf

see leaf illustration

3

: having or being a response or output that is directly proportional to the input

4

: of, relating to, or based or depending on sequential development

linear thinking

a linear narrative

linearity

ˌli-nē-ˈer-ə-tē 

-ˈa-rə-

noun

linearly

ˈli-nē-ər-lē 

adverb

Synonyms

• direct
• straight
• straightforward

Examples of linear in a Sentence

a flat, almost linear horizon

the bullets from early firearms were notorious for not following a strictly linear path through the air

Recent Examples on the Web

Rethink The Funnel: Trust The Educated Buyer Traditional sales funnels are linear. —Leonard Cercone, Forbes.com, 27 June 2025

Carriage disputes have become increasingly common across the media industry, as programmers and distributors seek to keep revenue from linear TV flowing as customers jump to digital venues for their news, sports and entertainment. —Brian Steinberg, Variety, 26 June 2025

In addition to interviews with a slew of famous celebrities, from Lucille Ball and Gilda Radner to Mel Brooks and Muhammad Ali, several of the episodes being added will also include their original musical performances — a rarity with classic talk and variety shows on streaming or even linear TV. —Josef Adalian, Vulture, 26 June 2025

As its broadcast partner, the BBC brings audiences wall-to-wall coverage of the fest, with stars shown on linear TV and hundreds of performances available to watch on-demand via iPlayer or heard on the radio. —Max Goldbart, Deadline, 25 June 2025

Word History

First Known Use

circa 1656, in the meaning defined at sense 1a(1)

Phrases Containing linear

• linear accelerator
• linear algebra
• linear combination
• linear dependence
• linear equation
• linear function
• linear independence
• linear interpolation
• linear measure
• linear motor
• linear perspective
• linear programming
• linear regression
• linear space
• linear transformation

Kids Definition

linear

adjective

lin·​ear

ˈlin-ē-ər

1

a

: relating to, consisting of, or resembling a line : straight

b

: involving a single dimension

c

: of, relating to, based on, or being linear equations or linear functions

2

: long and uniformly narrow

the linear leaf of the hyacinth

linearity

ˌlin-ē-ˈar-ət-ē

noun

linearly

ˈlin-ē-ər-lē

adverb

Medical Definition

linear

adjective

lin·​ear ˈlin-ē-ər 

: of, relating to, or resembling a line

linearity

ˌlin-ē-ˈar-ət-ē 

noun

plural linearities

linearly

ˈlin-ē-ər-lē 

adverb