triangle

[trahy-ang-guhl]

noun

1. a closed plane figure having three sides and three angles.

2. a flat triangular piece, usually of plastic, with straight edges, used in connection with a T square for drawing perpendicular lines, geometric figures, etc.

3. any three-cornered or three-sided figure, object, or piece.

   a triangle of land.

4. a musical percussion instrument that consists of a steel triangle, open at one corner, that is struck with a steel rod.

5. a group of three; triad.

6. a situation involving three persons, especially one in which two of them are in love with the third.

7. Astronomy.,  Triangle, the constellation Triangulum.

triangle

/ ˈtraɪˌæŋɡəl /

noun

1. 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

2. any object shaped like a triangle

3. any situation involving three parties or points of view See also eternal triangle

4. music a percussion instrument consisting of a sonorous metal bar bent into a triangular shape, beaten with a metal stick

5. a group of three

triangle

1. A closed geometric figure consisting of three sides.

Other Word Forms

• triangled adjective

Word History and Origins

Origin of triangle¹

First recorded in 1350–1400; Middle English, from Latin triangulum, noun use of neuter of triangulus “three-cornered”, tri-, angle ¹

Word History and Origins

Origin of triangle¹

C14: from Latin triangulum (noun), from triangulus (adjective), from _tri- + angulus corner

Idioms and Phrases

see eternal triangle.

Example Sentences

Several of her books involve love triangles in which a woman is torn between two men, one of whom readers will recognize as patently unsuitable before her protagonist does.

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Invitation Homes and American Homes 4 Rent AMH -0.43%decrease; red down pointing triangle are still seeing healthy rent growth in the Midwest and parts of the West Coast.

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Electronic Arts EA -0.00%increase; green up pointing triangle is saying ”game over” to Wall Street in the largest leveraged buyout of all time.

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Bank of America BAC 0.31%increase; green up pointing triangle , which advised Norfolk Southern on its sale, is set to earn an estimated $130 million fee for its work, if all goes according to plan.

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Bank of Montreal BMO 0.14%increase; green up pointing triangle has recently explored a sale of some of its U.S. branches with roughly $6 billion in deposits, according to people familiar with the matter.

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Related Words

• adultery 
• affair 
• courtship 
• dalliance 
• devotion 
• fling 
• flirtation 
• infidelity 
• involvement 
• liaison 
• love 
• passion 
• relationship 
• tryst