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.
Familiar is the all-new camera panel that stretches the width of the phone, similar to the camera bar on the Google Pixel 9 Pro, for instance but bigger because the three cameras are still arranged in triangular fashion on the left. David Phelan, Forbes.com, 23 Apr. 2025 The front could be mistaken for a courthouse or temple, with rectangular columns holding up a triangular pediment, all of which marked the entrance to what was once called Eagles Hall. Blake Nelson, San Diego Union-Tribune, 17 Apr. 2025 The research team used advanced 3D imaging technology to find the ancient ant had many features similar to modern dirt ants, including distinctive mandibles with 12 triangular teeth for catching prey. Doc Louallen, ABC News, 17 Apr. 2025 Their triangular forewings propel them at up to 30 miles per hour. Jesse Greenspan, Scientific American, 13 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 Apr. 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)

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