VALID'ITY, noun 1. Strength or force to convince; justness; soundness; as the validity of an argument or proof; the validity of an objection. 2. Legal strength or force; that quality of a thing which renders it supportable in law or equity; as the validity of a will; the validity of a grant; the validity of a claim or of a title. Certain forms and solemnities are usually requisite to give validity to contracts and conveyances of rights. 3. Value. [Not in use.]
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI