Meaning of TRIANGLE in English

TRIANGLE

noun a small constellation situated between aries and andromeda.

2. triangle ·noun a figure bounded by three lines, and containing three angles.

3. triangle ·noun a draughtsman's square in the form of a right-angled triangle.

4. triangle ·noun a small constellation near the south pole, containing three bright stars.

5. 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.

6. 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.

Webster English vocab.      Английский словарь Webster.