triangle
Americannoun
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a closed plane figure having three sides and three angles.
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a flat triangular piece, usually of plastic, with straight edges, used in connection with a T square for drawing perpendicular lines, geometric figures, etc.
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any three-cornered or three-sided figure, object, or piece.
a triangle of land.
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a musical percussion instrument that consists of a steel triangle, open at one corner, that is struck with a steel rod.
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a group of three; triad.
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a situation involving three persons, especially one in which two of them are in love with the third.
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Astronomy. Triangle, the constellation Triangulum.
noun
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geometry a three-sided polygon that can be classified by angle, as in an acute triangle, or by side, as in an equilateral triangle. Sum of interior angles: 180°; area: 1/ 2 base × height
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any object shaped like a triangle
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any situation involving three parties or points of view See also eternal triangle
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music a percussion instrument consisting of a sonorous metal bar bent into a triangular shape, beaten with a metal stick
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a group of three
Other Word Forms
- triangled adjective
Etymology
Origin of triangle
First recorded in 1350–1400; Middle English, from Latin triangulum, noun use of neuter of triangulus “three-cornered”, tri-, angle 1
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
British Airways owner International Consolidated Airlines Group IAG -1.77%decrease; red down pointing triangle posted higher net profit and revenue, driven by strong travel and premium cabin demand.
MP Materials MP 2.28%increase; green up pointing triangle posted lower revenue following its decision to cease rare earth sales to China as part of its agreement with the U.S. government.
Sweetgreen’s SG 4.78%increase; green up pointing triangle sales continued their fall despite price increases and a transformation plan to try to turn around dwindling traffic.
Hormel HRL -1.90%decrease; red down pointing triangle Foods logged higher profit and revenue in its fiscal first quarter, as the steps it has taken to improve profitability are starting to yield results.
The latter includes makers of memory chips, hard drives, fiber-optic cabling and even power generators—Caterpillar’s CAT -0.21%decrease; red down pointing triangle 34% gain so far this year is leading the Dow.
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
