Definitions of triangle

  1. a three- sided polygon
  2. any of various triangular drafting instruments used to draw straight lines at specified angles
  3. something approximating the shape of a triangle; " the coastline of Chile and Argentina and Brazil forms two legs of a triangle"
  4. A figure bounded by three lines, and containing three angles.
  5. An instrument of percussion, usually made of a rod of steel, bent into the form of a triangle, open at one angle, and sounded by being struck with a small metallic rod.
  6. A draughtsman's square in the form of a right- angled triangle.
  7. A small constellation situated between Aries and Andromeda.
  8. A small constellation near the South Pole, containing three bright stars.
  9. A kind of frame formed of three poles stuck in the ground and united at the top, to which soldiers were bound when undergoing corporal punishment, - now disused.
  10. A plane figure bounded by three straight lines and having three angles; a musical instrument consisting of a steel rod bent in the form of a triangle, sounded by being struck.
  11. ( math.) A plane figure with three angles and three sides: ( music) an instrument of steel in the form of a triangle.
  12. A plane figure with three angles and three sides.
  13. A figure bounded by three sides, and having three angles.
  14. A figure bounded by three lines, and containing threo angles; a steel instrument of percussion in music, bent into the form of a triangle; three halberts or poles stuck in the ground and united at the top, to which soldiers are bound when flogged.
  15. A three- sided structure or area ; various structures.
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