- (n.) A draughtsman's square in the form of a right-angled triangle.
- (n.) A small constellation situated between Aries and Andromeda.
- (n.) 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.
- (n.) 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.
- (n.) A figure bounded by three lines, and containing three angles.
- (n.) A small constellation near the South Pole, containing three bright stars.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). triangle. Retrieved September 20, 2026, from http://smartdefine.org/triangle/definitions/2074466 |
| Chicago | Webster's. 2011. "triangle" http://smartdefine.org/triangle/definitions/2074466 (accessed September 20, 2026). |
| Harvard | Webster's 2011, triangle, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/triangle/definitions/2074466>. |
| MLA | Webster's. "triangle" 28 May 2011. Web. 20 September 2026. <http://smartdefine.org/triangle/definitions/2074466> |