invalid
/ɪnˈvæl.ɪd/ adjective, noun, verb
Forms invalids invaliding invalided
- adjective Not valid; not true, correct, acceptable, or appropriate. “Your argument is invalid because it uses circular reasoning.”
- noun (dated, sometimes offensive) Any person with a disability or illness.
- noun (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.
- noun (archaic) A disabled member of the armed forces; one unfit for active duty due to injury.
- adjective Suffering from disability or illness.
- adjective Intended for use by an invalid.
- verb (UK, transitive) To exempt from (often military) duty because of injury or ill health. “He was invalided home after the car crash.”
- verb (transitive) To make invalid or affect with disease.
Synonyms
Antonyms
Etymology
Borrowed from Middle French invalide, from Latin invalidus (“infirm, weak”), from in- (“not”) + validus (“strong”).
Webster’s 1913
- adjective Of no force, weight, or cogency; not valid; weak.
- adjective Having no force, effect, or efficacy; void; null; as, an invalid contract or agreement.
- noun A person who is weak and infirm; one who is disabled for active service; especially, one in chronic ill health.
- adjective Not well; feeble; infirm; sickly; as, he had an invalid daughter.
Etymology [Pref. in- not + valid: cf. F. invalide, L. invalidus infirm, weak. Cf. Invalid infirm.]
Etymology [F. invalide, n. & a., L. invalidus, a. See Invalid null.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “invalid”, CC BY-SA 4.0. Details