triangle

noun

tri·​an·​gle ˈtrī-ˌaŋ-gəl How to pronounce triangle (audio)
1
: a polygon having three sides compare spherical triangle
2
a
: a percussion instrument consisting of a rod of steel bent into the form of a triangle open at one angle and sounded by striking with a small metal rod
b
: a drafting instrument consisting of a thin flat right-angled triangle of wood or plastic with acute angles of 45 degrees or of 30 degrees and 60 degrees
3
: a situation in which one member of a couple is involved in a love affair with a third person

Illustration of triangle

Illustration of triangle
  • 1 equilateral
  • 2 acute
  • 3 obtuse
  • 4 scalene
  • 5 isosceles
  • 6 right triangle

Examples of triangle in a Sentence

She cut the sandwiches into triangles.
Recent Examples on the Web The film, which hits theaters April 26, centers on a love triangle between three tennis players with deeply competitive spirits both in the game and off the court. Steven J. Horowitz, Variety, 19 Apr. 2024 There has also been a theory that Shevchenko was involved in a love triangle between UFC women’s bantamweight champion Holly Holm and MMA fighter Jon Jones. Dina Kaur, The Arizona Republic, 15 Apr. 2024 Especially after recent events, Gabriela finds herself in what TV fans will recognize as a classic love triangle with Diego and Bode. Los Angeles Times Staff, Los Angeles Times, 12 Apr. 2024 The trio, who are in a love triangle in the film, attended the Challengers premiere at Odeon Luxe Leicester Square, in London, on Wednesday night, April 10. Esme Mazzeo, Peoplemag, 12 Apr. 2024 This film details a love triangle centered around Tashi (Zendaya), a tennis prodigy who begins a romantic relationship with two other professional tour players, Art (Mike Faist) and Patrick (Josh O'Connor). Valentine Servant-Ulgu, Glamour, 6 Apr. 2024 The film — while nominally a love triangle — gradually reveals itself as another instance of empathy and espionage colliding. Dennis Perkins, EW.com, 5 Apr. 2024 Unable to say no, Rudy accepts and starts a painfully awkward love triangle. Lovia Gyarkye, The Hollywood Reporter, 4 Apr. 2024 His dish looked like an intricate sculpture with lots of triangles. Buddha Lo, Peoplemag, 11 Apr. 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'triangle.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

Middle English, from Anglo-French, from Latin triangulum, from neuter of triangulus triangular, from tri- + angulus angle

First Known Use

14th century, in the meaning defined at sense 1

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

Dictionary Entries Near triangle

Cite this Entry

“Triangle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/triangle. Accessed 26 Apr. 2024.

Kids Definition

triangle

noun
tri·​an·​gle ˈtrī-ˌaŋ-gəl How to pronounce triangle (audio)
1
: a figure that has three sides and three angles : a polygon that has three sides
2
: a percussion instrument made of a steel rod bent into a triangle open at one corner which is played by striking with a metal rod
3
: a drafting instrument consisting of a thin flat right-angled triangle

Medical Definition

triangle

noun
tri·​an·​gle ˈtrī-ˌaŋ-gəl How to pronounce triangle (audio)
: a three-sided region or space and especially an anatomical one see anterior triangle, carotid triangle, femoral triangle, posterior triangle, suboccipital triangle

More from Merriam-Webster on triangle

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