Invalid(a.) Of no force, weight, or cogency; not valid; weak.
Invalid(a.) Having no force, effect, or efficacy; void; null; as, an invalid contract or agreement.
Invalid(a.) A person who is weak and infirm; one who is disabled for active service; especially, one in chronic ill health.
Invalid(n.) Not well; feeble; infirm; sickly; as, he had an invalid daughter.
Invalid(v. t.) To make or render invalid or infirm.
Invalid(v. t.) To classify or enroll as an invalid.
Invalidate(v. t.) To render invalid; to weaken or lessen the force of; to destroy the authority of; to render of no force or effect; to overthrow; as, to invalidate an agreement or argument.
Invalidated(imp. & p. p.) of Invalidate
Invalidating(p. pr. & vb. n.) of Invalidate
Invalidation(n.) The act of inavlidating, or the state of being invalidated.
Invalide(n.) See Invalid, n.
Invalidism(n.) The condition of an invalid; sickness; infirmity.
Invalidity(n.) Want of validity or cogency; want of legal force or efficacy; invalidness; as, the invalidity of an agreement or of a will.
Invalidity(n.) Want of health; infirmity.
Invalidness(n.) Invalidity; as, the invalidness of reasoning.
Words within invalidate