1. (n.) A solid body standing on a triangular, square, or polygonal base, and terminating in a point at the top; especially, a structure or edifice of this shape.

2. (n.) A solid figure contained by a plane rectilinear figure as base and several triangles which have a common vertex and whose bases are sides of the base.

3. (n.) The game of pool in which the balls are placed in the form of a triangle at spot.

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