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WordReference Random House Learner's Dictionary of American English © 2020 tri•an•gle /ˈtraɪˌæŋgəl/
USA pronunciation n. [ countable ]
Mathematicsa closed plane figure having three sides and three angles: an equilateral triangle.
a flat, three-sided piece of metal or plastic, with straight edges, used with a T square for drawing lines, etc.
any three-cornered or three-sided figure or piece: a triangle of land. a delicate situation involving three persons, esp. one in which two of them are in love with the third.
tri•an•gu•lar /traɪˈæŋgyəlɚ/ USA pronunciation adj. WordReference Random House Unabridged Dictionary of American English © 2020 tri•an•gle
(trī ′ang′gəl), USA pronunciation n.
a closed plane figure having three sides and three angles.
a flat triangular piece, usually of plastic, with straight edges, used in connection with a T square for drawing perpendicular lines, geometric figures, etc.
any three-cornered or three-sided figure, object, or piece: a triangle of land.
a musical percussion instrument that consists of a steel triangle, open at one corner, that is struck with a steel rod.
a group of three; triad.
a situation involving three persons, esp. one in which two of them are in love with the third. ( ) [cap. ] the constellation Triangulum. [Astron. ]
tri ′an′gled, adj.
Latin triangulum, noun, nominal use of neuter of triangulus three-cornered. See tri-, angle 1 Middle English 1350–1400
Collins Concise English Dictionary © HarperCollins Publishers::
triangle / ˈtraɪˌæŋɡ/ əl n 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: ½base × height any object shaped like a triangle any situation involving three parties or points of view See also eternal triangle a percussion instrument consisting of a sonorous metal bar bent into a triangular shape, beaten with a metal stick a group of three Etymology: 14 th Century: from Latin triangulum (noun), from triangulus (adjective), from tri- + angulus corner ˈtriˌangled adj
triangle' also found in these entries: