having the constituent parts so compact, or so firmly adhering, as to resist the impression or penetration of other bodies; having a fixed form; hard; firm; compact; -- opposed to fluid and liquid or to plastic, like clay, or to incompact, like sand.-not hollow; full of matter; as, a solid globe or cone, as distinguished from a hollow one; not spongy; dense; hence, sometimes, heavy.-having all the geometrical dimensions; cubic; as, a solid foot contains 1,728 solid inches.-firm; compact; strong; stable; unyielding; as, a solid pier; a solid pile; a solid wall.-applied to a compound word whose parts are closely united and form an unbroken word; -- opposed to hyphened.-fig.: worthy of credit, trust, or esteem; substantial, as opposed to frivolous or fallacious; weighty; firm; strong; valid; just; genuine.-sound; not weakly; as, a solid constitution of body.-of a fleshy, uniform, undivided substance, as a bulb or root; not spongy or hollow within, as a stem.-impenetrable; resisting or excluding any other material particle or atom from any given portion of space; -- applied to the supposed ultimate particles of matter.-not having the lines separated by leads; not open.-united; without division; unanimous; as, the delegation is solid for a candidate.-a substance that is held in a fixed form by cohesion among its particles; a substance not fluid.-a magnitude which has length, breadth, and thickness; a part of space bounded on all sides.