Webster 1913 Edition
The quality or state of being sound;
soundnessof timber, of fruit, of the teeth, etc.; the
soundnessof reasoning or argument;
Syn. – Firmness; strength; solidity; healthiness; truth; rectitude.
Webster 1828 Edition
1.Wholeness; entireness; an unbroken, unimpaired or undecayed state; as the soundness of timber, of fruit, of the teeth, of a limb, &c.
2.An unimpaired state of an animal or vegetable body; a state in which the organs are entire and regularly perform their functions. We say, the soundness of the body, the soundness of the constitution, the soundness of health.
3.Firmness; strength; solidity; truth; as soundness of reasoning or argument, of doctrine or principles.
4.Truth; rectitude; firmness; freedom from error or fallacy; orthodoxy; as soundness of faith.