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.
Cubes of jerk chicken with thick slivers of red onion and green pepper adorned the triangular slice, with a spice that felt warm the way jerk chicken should without being overpowering, the way jerk chicken can be. Kaitlyn Rosati, New York Daily News, 14 May 2025 Luxembourg’s 1980 submission featured singing sisters Sophie and Magaly in bright, triangular tuxedo suits that predate Klaus Nomi’s similar fashion, accompanied by a tall man who waddles around onstage in a large sequin penguin costume (the backup singers were in penguin sequins, too). Nick Allen, Vulture, 13 May 2025 Bainbridge’s vehicle stopped on the gore, the grassy triangular area between the on-ramp and the freeway. Rose Evans, Idaho Statesman, 11 May 2025 Anyway, coffee cake scones in the end turned out to be these triangular scones that are very buttery, flaky, and short. Bon Appétit, Bon Appetit Magazine, 7 May 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 May. 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

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!