quadrilateral

noun
quad·​ri·​lat·​er·​al | \ˌkwä-drə-ˈla-t(ə-)rəl \

Definition of quadrilateral 

(Entry 1 of 2)

: a polygon of four sides

quadrilateral

adjective

Definition of quadrilateral (Entry 2 of 2)

: having four sides

Examples of quadrilateral in a Sentence

Recent Examples on the Web: Noun

The new 2,700-square-foot space feels like a geometric funhouse — quadrilaterals of wood overhead, an enveloping half-circle over the open kitchen, and the hypotenuse of the bar slanting through the lounge. Tan Vinh, The Seattle Times, "Art of the Table lounge aims high — too high?," 27 Apr. 2017

Recent Examples on the Web: Adjective

The Trump administration should help further incorporate India into this emerging quadrilateral relationship between themselves, Japan, and Australia. Evan Moore, National Review, "Strengthen the U.S.–India Relationship," 1 Feb. 2018 Admiral Harris’s proposal of a quadrilateral security grouping, given at a forum hosted by the Observer Research Foundation, is certain to capture Beijing’s attention. Ellen Barry, New York Times, "What China Has Been Building in the South China Sea," 2 Mar. 2016

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'quadrilateral.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of quadrilateral

Noun

1650, in the meaning defined above

Adjective

1656, in the meaning defined above

History and Etymology for quadrilateral

Noun

Latin quadrilaterus four-sided, from quadri- + later-, latus side

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Time Traveler for quadrilateral

The first known use of quadrilateral was in 1650

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More Definitions for quadrilateral

quadrilateral

noun

English Language Learners Definition of quadrilateral

geometry : a flat shape that has four sides and four angles

quadrilateral

noun
quad·​ri·​lat·​er·​al | \ˌkwä-drə-ˈla-tə-rəl \

Kids Definition of quadrilateral

: a flat geometric figure of four sides and four angles

quadrilateral

adjective
quad·​ri·​lat·​er·​al | \ˌkwäd-rə-ˈlat-ə-rəl, -ˈla-trəl \

Medical Definition of quadrilateral 

: having four sides a quadrilateral muscle

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