trianglePronunciation: /ˈtrʌɪaŋg(ə)l/Translate triangle | into French | into German | into Italian | into Spanish Definition of triangle noun 1a plane figure with three straight sides and three angles:an equilateral triangle a thing shaped like a triangle:a small triangle of grass a musical instrument consisting of a steel rod bent into a triangle and sounded by being struck with a small steel rod. a frame used to position the pool balls in snooker and pool. North American a drawing instrument in the form of a right-angled triangle. (triangles) historical a frame of three halberds joined at the top to which a soldier was bound for flogging. 2 (also eternal triangle) an emotional relationship involving a couple and a third person with whom one of them is also involved. 3a small brownish Eurasian moth of oak and beech woods. Heterogenea asella, family Limacodidae Origin: late Middle English: from Old French triangle or Latin triangulum, neuter of triangulus 'three-cornered' (see tri-, angle1)triangle in other Oxford dictionaries Definition of triangle in the US English dictionary
