2. (Law) Having no force, effect, or efficacy; void; null; as, an
invalid contract or agreement.
In"va*lid (?; 277), n. [F. invalide, n. & a., L. invalidus, a. See
Invalid null.] A person who is weak and infirm; one who is disabled for
active service; especially, one in chronic ill health.
In"va*lid (?), a. [See Invalid, n.] Not well; feeble; infirm; sickly;
as, he had an invalid daughter.
In"va*lid, v. t. 1. To make or render invalid or infirm. "Invalided,
bent, and almost blind." Dickens.