1. One who is confined to home or bed because of illness, disability or injury
  2. Any person with a disability.


  1. To exempt from duty because of injury or ill health.
    He was invalided home after the car crash.


  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.

Adjective (etymology 2)

  1. Intended for use by an invalid.

The above text is a snippet from Wiktionary: invalid
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