INVALID

invalid

(adjective) no longer valid; “the license is invalid”

invalid

(adjective) having no cogency or legal force; “invalid reasoning”; “an invalid driver’s license”

invalid, shut-in

(noun) someone who is incapacitated by a chronic illness or injury

disable, invalid, incapacitate, handicap

(verb) injure permanently; “He was disabled in a car accident”

invalid

(verb) force to retire, remove from active duty, as of firemen

Source: WordNet® 3.1

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Etymology 1

Adjective

invalid (comparative more invalid, superlative most invalid)

Not valid; not true, correct, acceptable or appropriate.

Synonyms

• nonvalid

• disallowed

Antonyms

• valid

Etymology 2

Noun

invalid (plural invalids)

(dated, sometimes, offensive) Any person with a disability or illness.

(dated, sometimes, offensive) A person who is confined to home or bed because of illness, disability or injury; one who is too sick or weak to care for themselves.

(archaic) A disabled member of the armed forces; one unfit for active duty due to injury.

Adjective

invalid (not comparable)

Intended for use by an invalid.

Verb

invalid (third-person singular simple present invalids, present participle invaliding, simple past and past participle invalided)

(British, transitive) To exempt from duty because of injury or ill health.

(transitive) To make invalid or affect with disease.

Source: Wiktionary

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In*val"id, a. Etym: [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)

Definition: Having no force, effect, or efficacy; void; null; as, an invalid contract or agreement.

In"va*lid, n. Etym: [F. invalide, n. & a., L. invalidus, a. See Invalid null.]

Definition: A person who is weak and infirm; one who is disabled for active service; especially, one in chronic ill health.

In"va*lid, a. Etym: [See Invalid, n.]

Definition: 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.

2. To classify or enroll as an invalid. Peace coming, he was invalided on half pay. Carlyle.

Source: Webster’s Unabridged Dictionary 1913 Edition

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