Sound'ness, n.

n. The state of being sound or firm; wholeness; entireness; as, the soundness of timber, of fruit, of the teeth, of a limb, and the like; firmness; strength; solidity; as, soundness of reasoning or argument; truth; rectitude; freedom from error or fallacy; orthodoxy; as, soundness of faith. Syn.—Firmness; strength; solidity; healthiness; truth; rectitude.