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.
soundness (countable and uncountable, plural soundnesses)
- (uncountable) The state or quality of being sound.
- (countable) The result or product of being sound.
- (logic) The property (of an argument) of not only being valid, but also of having true premises.
- (logic) The property of a logical theory that whenever a wff is a theorem then it must also be valid. Symbolically, letting T represent a theory within logic L, this can be represented as the property that whenever is true, then must also be true, for any wff φ of logic L.
the state or quality of being sound
the result or product of being sound
the property of logical theory