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 triangular (audio) , -​ˈla-​rə-​tē \ noun
triangularly \ trī-​ˈaŋ-​gyə-​lər-​lē How to pronounce triangular (audio) \ adverb

Examples of triangular in a Sentence

Recent Examples on the Web The shopping bags have a distinctive triangular cut-out to create a handle—the triangle is now a signature branding motif on clothes, belt buckles, and other accessories. Jessica Iredale, Town & Country, "Why Bottega Veneta Will Eventually Return to Social Media," 11 Jan. 2021 This triangular scale ruler is essential for anyone in construction, interior design, architecture, or engineering. Popular Science, "The best rulers for home, office, and school," 8 Jan. 2021 Glued together with swirls of frosting, the triangular structure was supported by plywood and dotted with brightly-colored Gumdrops candy. Nora Mishanec,, "Christmas in the Bay Area felt different this year, but the pandemic couldn’t dampen all cheer and charity," 25 Dec. 2020 Two secondary weapons bays can also be found in triangular structures located under the fighter's wing roots that open like clamshells to reveal short-range air-to-air missiles. Alex Hollings, Popular Mechanics, "Su-57 Vs. J-20: What the Competition Tells Us About America's New Fighter," 6 Dec. 2020 The triangular end has three different sizes for gaps of varying width. Matt Jancer, Wired, "Gear and Tips to Winter-Proof Your Home and Stay Warm," 3 Jan. 2021 There are the triangular windows tucked just under the eave-less gable roof line. Sarah Bonnette | Contributing Writer,, "Floor-to-ceiling windows let the Indoors and outdoors merge in a sleek Covington renovation," 30 Dec. 2020 The snakes flatten their round torso into a flattened, triangular shape in order to catch more air and glide from one tree to another, sometimes dozens of feet away. Rachael Lallensack, Smithsonian Magazine, "Ten Scientific Discoveries From 2020 that May Lead to New Inventions," 28 Dec. 2020 The triangular shape of PAU’s design grew from a desire to mediate between Pei’s pyramid, the Lake Erie waterfront, and Cleveland’s downtown, set upon a flat bluff overlooking the Rock Hall, Chakrabarti said. Steven Litt, cleveland, "Rock Hall picks firm to design expansion of its iconic lakefront building with ‘reverence and irreverence’," 18 Dec. 2020

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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Time Traveler for triangular

Time Traveler

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

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Statistics for triangular

Last Updated

24 Jan 2021

Cite this Entry

“Triangular.” Dictionary, Merriam-Webster, Accessed 24 Jan. 2021.

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More Definitions for triangular


How to pronounce triangular (audio)

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

More from Merriam-Webster on triangular

Nglish: Translation of triangular for Spanish Speakers

Britannica English: Translation of triangular for Arabic Speakers

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