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
adjectiveDefinition of quadrilateral (Entry 2 of 2)
: having four sides
Examples of quadrilateral in a Sentence
Recent Examples on the Web: Noun
The ancient Greeks proved that the only regular polygons that tile are triangles, quadrilaterals and hexagons (as now seen on many a bathroom floor). — Quanta Magazine, "Pentagon Tiling Proof Solves Century-Old Math Problem," 11 July 2017 With Arabists like Eddy and Aramco’s government relations men urging him on, the president would attempt a bolder progression—to turn his tri-faith America into a quadrilateral. — Darren Dochuk, The New Republic, "Men of God and the Genesis of the U.S.-Saudi Relationship," 17 July 2019 In the course of trying to prove that certain other kinds of orbit closures don’t exist, the mathematician Alex Wright (who was collaborating with Mirzakhani) stumbled across the first hints of the new quadrilaterals with optimal dynamics. — Quanta Magazine, "Why Mathematicians Like to Classify Things," 15 Aug. 2017 The two were, in a sense, trying to prove that shapes like these quadrilaterals don’t exist. — Quanta Magazine, "New Shapes Solve Infinite Pool-Table Problem," 8 Aug. 2017 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. 2017Recent 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. 2016These 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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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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