Sound·ness, n. The quality or state of being sound; as, the soundness of timber, of fruit, of the teeth, etc.; the soundness of reasoning or argument; soundness of faith.
Syn: -- Firmness; strength; solidity; healthiness; truth; rectitude.
n 1: a state or condition free from damage or decay [ant: unsoundness]
2: the quality of being prudent and sensible [syn: wisdom, wiseness]
3: the firmness and tone of healthy tissue; "his muscle
firmness" [syn: firmness]