triangular

adjective

tri·​an·​gu·​lar trī-ˈaŋ-gyə-lər How to pronounce triangular (audio)
1
a
: 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
2
a(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
triangularity noun
triangularly adverb

Examples of triangular in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
In a landscape park in western Poland, remote sensing equipment discovered long, triangular formations below the surface, according to a July 9 Facebook post from the Team of Landscape Parks of the Greater Poland Voivodeship. Irene Wright july 14, Miami Herald, 14 July 2025 Last August, the campus debuted an open-air music venue, the Geode, comprising four triangular structures that reflect the music played within them as audiences take in views of the Beartooth Mountains. AFAR Media, 14 July 2025 The triangular bandana slides onto his collar with ease and is made from a stretchy, evaporative fabric that stays cool for hours. Ali Faccenda, People.com, 11 July 2025 Kids love building houses, castles, vehicles, and whatever else occurs to them with these triangular and square magnetic tiles. Simon Hill, Wired News, 11 July 2025 See All Example Sentences for triangular

Word History

Etymology

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

First Known Use

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

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

Cite this Entry

“Triangular.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/triangular. Accessed 21 Jul. 2025.

Kids Definition

triangular

adjective
tri·​an·​gu·​lar trī-ˈaŋ-gyə-lər How to pronounce triangular (audio)
1
: of, relating to, or having the form of a triangle
2
: having a triangular base or principal surface
a triangular pyramid

Medical Definition

triangular

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

More from Merriam-Webster on triangular

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