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.
The simplicity of the structure, with its triangular façade and modest bell tower, suggests that Pasaco could stand in for so many other Guatemalan locales. Jonathan Blitzer, New Yorker, 14 June 2025 Opposite each other are two triangular plates honoring Wilburn and Carter with the roof bringing them together. James Russell, Fort Worth Star-Telegram, 11 June 2025 The other was a triangular area spanning Gracechurch, Lombard, and Cornhill, radiating out from Leadenhall Market. ArsTechnica, 6 June 2025 The triangular tip makes precise application a breeze, and with shades that complement one another, mixing and matching is highly encouraged. Annie Blackman, Allure, 30 Apr. 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 27 Jun. 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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