·noun A small constellation situated between Aries and Andromeda.
II. Triangle ·noun A figure bounded by three lines, and containing three angles.
III. Triangle ·noun A draughtsman's square in the form of a right-angled triangle.
IV. Triangle ·noun A small constellation near the South Pole, containing three bright stars.
V. Triangle ·noun 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.
VI. Triangle ·noun 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.