• enPR: ĭn-vă'lĭd, IPA: /ɪnˈvæl.ɪd/


  1. Not valid; not true, correct, acceptable or appropriate.
    Your argument is invalid because it uses circular reasoning.
    This invalid contract cannot be legally enforced.
Synonyms Antonyms Translations Pronunciation
  • enPR: ĭn'və-lĭd, IPA: /ˈɪn.və.lɪd/

invalid (plural invalids)

  1. (dated, sometimes, offensive) Any person with a disability or illness.
  2. (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.
  3. (archaic) A disabled member of the armed forces; one unfit for active duty due to injury.
Translations Adjective

invalid (not comparable)

  1. Intended for use by an invalid.
Related terms Verb

invalid (invalids, present participle invaliding; past and past participle invalided)

  1. (British, transitive) To exempt from duty because of injury or ill health.
    He was invalided home after the car crash.
  2. (transitive) To make invalid or affect with disease.

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