tri·​an·​gu·​lar | \trī-ˈaŋ-gyə-lər \

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 , -​ˈla-​rə-​tē \ noun
triangularly \ trī-​ˈaŋ-​gyə-​lər-​lē \ adverb

Examples of triangular in a Sentence

Recent Examples on the Web

The 98-mile levee protects a triangular area between Gibson and Larose in central Louisiana, including the Houma area. Mark Schleifstein,, "State hopes to use $1.2B in HUD money for flood protection," 6 Apr. 2018 And how do the critters’ silk strands form a triangular sheet without getting tangled together? Brigit Katz, Smithsonian, "Before Soaring Through the Air, Tiny Crab Spiders Study the Wind," 18 June 2018 In Muskego, Casey's has petitioned for conditional-use permits for two different lots — one on a narrow triangular area at Mercury Drive and Janesville Road, and the other where College Avenue and Janesville Road converge near the New Berlin border. Jim Riccioli, Milwaukee Journal Sentinel, "Casey's General Stores eyes two convenience-store sites in Muskego as part of its county plans," 16 Mar. 2018 The triangular shape of the site is similar to the Tinley Park property, at South Street and 67th Court, where the Boulevard development is proposed. Mike Nolan, Daily Southtown, "Apartments planned for Orland Park site near Main Street Triangle," 19 June 2018 The triangular property currently contains a single concrete block building, canopy, fuel pumps and related parking. Karen Huppertz, ajc, "Snellville approves reopening for Sims gas station," 14 June 2018 The 1927 Tudor Revival-style house in Northeast Portland's Alameda neighborhood sits on The Alameda, a block-long, triangular site originally known as Gravelly Ridge. Janet Eastman,, "Autzen mansion sells for $4 million: Plywood baron's 1927 Tudor (photos)," 13 June 2018 The small triangular vent extending from a nook above the base is one example. John King,, "New nimble, frisky SoMa tower fits neatly into surroundings," 6 July 2018 One floor-sweeping triangular feather dress could have been overpowering, but was modelled on 5ft 10 inch model Kaia Gerber, Cindy Crawford’s daughter, with huge va-va-voom hair. Washington Post, "Standing ovation at Valentino caps Paris couture week," 4 July 2018

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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Last Updated

27 Sep 2018

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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 \

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 \

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

What made you want to look up triangular? Please tell us where you read or heard it (including the quote, if possible).


by force of circumstances

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