The Collaborative International Dictionary of English v.0.48:
Solid \Sol"id\, n. 1. A substance that is held in a fixed form by cohesion among its particles; a substance not fluid. [1913 Webster] 2. (Geom.) A magnitude which has length, breadth, and thickness; a part of space bounded on all sides. [1913 Webster] Solid of revolution. (Geom.) See Revolution, n., 5. [1913 Webster]