• (British) IPA: /ˈtɹaɪəŋɡəl/, /ˈtɹaɪˌæŋɡəl/
  • (America) enPR: trī'-ăng-gəl, IPA: /ˈtɹaɪˌæŋɡəl/

triangle (plural triangles)

  1. (geometry) A polygon with three sides and three angles.
  2. (US, Canada) A set square.
  3. (music) A percussion instrument made by forming a metal rod into a triangular shape which is open at one angle. It is suspended from a string and hit with a metal bar to make a resonant sound.
  4. (cue sports) A triangular piece of equipment used for gathering the balls into the formation required by the game being played.
  5. A love triangle.
    • 2009, Neil McDonald, Quadrant, November 2009, No. 461 (Volume LIII, Number 11), Quadrant Magazine Limited, page 104:
      One of the writers' most pleasing inventions was to treat the triangle love story as comedy.
  6. (systemics) The structure of systems composed with three interrelated objects.
  7. A draughtsman's square in the form of a right-angled triangle.
  8. (historical) A frame formed of three poles stuck in the ground and united at the top, to which soldiers were bound when undergoing corporal punishment.
  9. Any of various large papilionid butterflies of the genus Graphium.
    Synonyms: bluebottle
  10. (rail) A triangular formation of railway tracks, with a curve on at least one side.
    Synonyms: wye
Synonyms Translations Translations
Proper noun
  1. The area comprising the cities of Raleigh, Durham and Chapel Hill in North Carolina. Used with "the" except when attributive.
    I moved to the Triangle two years ago.
    Many Triangle residents enjoy iced tea.
  2. Ellipsis of Bermuda Triangle#English|Bermuda Triangle

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