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 triangular piece of property on Skokie Boulevard is current home to a Shell gas station at the corner. Pioneer Press,, "New development proposed in Skokie includes Wendy's restaurant, retail building," 25 June 2018 Discovered in 1955, the three-foot-long triangular skull was in exceptional condition for something so old. David Grossman, Popular Mechanics, "How Modern Tech Solved the Mystery Behind This Ancient Reptile's Skull," 9 Jan. 2019 The fist-sized triangular hoops that feature a gilded snake creeping out of the frame. Liana Satenstein, Vogue, "Rihanna-Approved DJ Sita Abellan Launches Her Own Jewelry Line," 6 Dec. 2018 The most distinctive aspect of the home is its triangular shape. David Grossman, Popular Mechanics, "Mysterious House From 'Star Trek: The Next Generation' Episode Up For Sale," 5 Nov. 2018 Peer over the balcony to the main hall, and the floor is covered in triangular chunks of steel and coal laid out by three artists who make up the art collective Postcommodity. Kelly Crow, WSJ, "Carnegie International Opens in Pittsburgh," 16 Oct. 2018 Legend has it that Boniface, a Benedictine monk, used the triangular shape of a fir tree to explain the Holy Trinity to pagans in Germany. Taysha Murtaugh, Country Living, "Those Upside-Down Christmas Trees Everyone's Flipping for Actually Go Way Back," 25 Sep. 2018 Shaped like a pink Christmas tree, the trio of palettes contains 18 eye shadows (most of which are shimmery neutral shades) in two triangular mini palettes, and a bronzer, blush, and highlighter mini palette. Macaela Mackenzie, Allure, "Too Faced's 2018 Holiday Makeup Collection Looks Like a Peachy Time of Year," 12 Sep. 2018 The shape has six sides at the top and five sides at the bottom, and one of the sides had a triangular protrusion. Avery Thompson, Popular Mechanics, "Scientists Discover a New Shape That Might Be Inside You Right Now," 30 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

1 Feb 2019

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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

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