tri·​an·​gu·​lar | \ trī-ˈaŋ-gyə-lər How to pronounce triangular (audio) \

Definition of triangular

1a : of, relating to, or having the form of a triangle a triangular plot of land
b : having a triangular base or principal surface a triangular table a triangular pyramid
2a(1) : of, relating to, or involving three elements a triangular agreement
(2) of a military group : based primarily on three units
b : of or relating to a love triangle

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Other Words from triangular

triangularity \ (ˌ)trī-​ˌaŋ-​gyə-​ˈler-​ə-​tē How to pronounce triangularity (audio) , -​ˈla-​rə-​tē \ noun
triangularly \ trī-​ˈaŋ-​gyə-​lər-​lē How to pronounce triangularly (audio) \ adverb

Examples of triangular in a Sentence

Recent Examples on the Web

Pairs of triangular columns, 8 feet tall and painted white, stand side by side. Los Angeles Times, "Review: In Mary Corse’s light paintings at LACMA, some shadows," 5 Aug. 2019 In the most overt piece Watchtower In Riot, 2014, a triangular red flag flies at the top. John Zotos, Dallas News, "Dallas exhibition of art star Francesco Clemente was years in the making — and worth the wait," 1 Aug. 2019 The sail is formed by four triangular sheets of extremely thin, reflective Mylar that form a square about the size of a boxing ring. Washington Post, "Images show Lightsail 2 spacecraft’s solar sail has deployed," 26 July 2019 The installation consists of a triangular table adorned with 39 place settings, each one honoring a different female figure from history and mythology—from Sappho, to Sacajawea, to Susan B. Anthony. Brigit Katz, Smithsonian, "Judy Chicago Retrospective to Look Beyond ‘The Dinner Party’," 23 July 2019 At 2:47 Eastern time on July 23, the big moment came—four cobalt-alloy booms extended like a tape measure, pulling with them four triangular Mylar sails. Robert Z. Pearlman, Scientific American, "Solar Sailing Success: Planetary Society Deploys LightSail 2," 23 July 2019 Their teeth come in all sizes and shapes, from serrated like a razor to triangular like a spear. National Geographic, "Sharks," 22 July 2019 In the garage clinic, a veterinary ophthalmologist from Indianapolis, Heidi Klein, was stitching Kryxis' eyelid together after removing a triangular section that was missing the dark rim elsewhere., "The trouble with tigers in America," 13 July 2019 The circuit board and polymer are originally made as a flat, triangular unit. John Timmer, Ars Technica, "Tiny robot leaps around carrying its own battery, electronics," 10 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'triangular.' 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 triangular

14th century, in the meaning defined at sense 1a

History and Etymology for triangular

Middle English trianguler, from Late Latin triangularis, from Latin triangulum

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Statistics for triangular

Last Updated

16 Aug 2019

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Time Traveler for triangular

The first known use of triangular was in the 14th century

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English Language Learners Definition of triangular

: shaped like a triangle
: involving three people, groups, or things


tri·​an·​gu·​lar | \ trī-ˈaŋ-gyə-lər How to pronounce triangular (audio) \

Kids Definition of triangular

1 : having three angles, sides, or corners a triangular sign
2 : of, relating to, or involving three parts or persons


tri·​an·​gu·​lar | \ trī-ˈaŋ-gyə-lər How to pronounce triangular (audio) \

Medical Definition of triangular

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More from Merriam-Webster on triangular

Spanish Central: Translation of triangular

Nglish: Translation of triangular for Spanish Speakers

Britannica English: Translation of triangular for Arabic Speakers

Comments on triangular

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