In*val"id (?), a. [Pref. in- not + valid: cf. F. invalide, L. invalidus infirm, weak. Cf. Invalid infirm.]
1.
Of no force, weight, or cogency; not valid; weak.
2. Law
Having no force, effect, or efficacy; void; null; as, an invalid contract or agreement.
© Webster 1913.
In"va*lid See Invalid null.]
A person who is weak and infirm; one who is disabled for active service; especially, one in chronic ill health.
© Webster 1913.
In"va*lid (?), a. [See Invalid, n.]
Not well; feeble; infirm; sickly; as, he had an invalid daughter.
© Webster 1913.
In"va*lid, v. t.
1.
To make or render invalid or infirm.
"
Invalided, bent, and almost blind."
Dickens.
2.
To classify or enroll as an invalid.
Peace coming, he was invalided on half pay.
Carlyle.
© Webster 1913.