1. State or quality of being solid; firmness; compactness; solidity, as of material bodies.
2. Soundness; strength; truth; validity, as of arguments, reasons, principles, and the like.
n 1: the state in which a substance has no tendency to flow under
moderate stress; resists forces (such as compression)
that tend to deform it; and retains a definite size and
shape [syn: solid]
2: the consistency of a solid [syn: solidity] [ant: porosity]