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⇱ TRIANGULAR Definition & Meaning - Merriam-Webster


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

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 aircraft also includes a triangular wing design and a modular structure. 👁 Image
Sujita Sinha, Interesting Engineering, 3 Apr. 2026
When compared to other free-hanging wilderness shelters, there are lighter hammock systems out there, but unlike the typical two-point setup of a hammock, each Tentstile tent uses a triangular three-strap setup to create a flatter, stabler floor. 👁 Image
New Atlas, 25 Mar. 2026
In America, scones are usually triangular, err on the crumbly and dense side, are loaded with mix-ins, and may be savory or sweet. 👁 Image
Karla Walsh, Better Homes & Gardens, 26 Feb. 2026
During wildlife surveys in 2022 and 2023 in eastern Thailand, a research team came across a small, nocturnal gecko with a triangular head and large, slightly protruding eyes. 👁 Image
Ryan Brennan, Kansas City Star, 25 Feb. 2026
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 7 Apr. 2026.

Kids Definition

triangular

adjective
1
: of, relating to, or having the form of a triangle
2
: having a triangular base or principal surface
a triangular pyramid

Medical Definition

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