Source : Webster's Revised Unabridged Dictionary (1913)
Validity \Va*lid"i*ty\, n. [Cf. F. validit['e], L. validitas
strength.]
1. The quality or state of being valid; strength; force;
especially, power to convince; justness; soundness; as,
the validity of an argument or proof; the validity of an
objection.
2. (Law) Legal strength, force, or authority; that quality of
a thing which renders it supportable in law, or equity;
as, the validity of a will; the validity of a contract,
claim, or title.
3. Value. [Obs.] ``Rich validity.'' --Shak.
Source : WordNet®
validity
n 1: the quality of being logically valid [syn: {cogency}, {rigor},
{rigour}]
2: the quality of having legal force or effectiveness [syn: {validness}]