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. Triangle, Astronomy. 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

/ trī′ăng′gəl /

1. A closed geometric figure consisting of three sides.

Derived Forms

• ˈtriˌangled, adjective

Other Words From

• triangled 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

Beverly Hills A dense concentration of high-profile places to go and things to do in the Golden Triangle certainly make this swanky slice of Greater L.A. seem walkable.

From Los Angeles Times

Previously Rolling Hills helped monitor land movement and passed that geological information along to residents, particularly in the 1980s, when land movement in the Flying Triangle landslide area was detected by Los Angeles County geologists.

From Los Angeles Times

So they offered properties in the Webster Triangle area of Wavertree for just £1.

From BBC

As vice-president, she has not directly shaped border policy but was put in charge of addressing the root causes of migration from the Northern Triangle countries of Guatemala, El Salvador, and Honduras.

From BBC

In the November 2021 incident, Young verbally harassed a 24-year-old woman as she was leaving a bar near the Triangle Square shopping center, police said.

From Los Angeles Times

Related Words

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