invalid Hear it!

invalid1 definition

in·va·lid (in′və lid; chiefly Brit, -lēd′)

adjective

  1. not well; weak and sickly; infirm
  2. of or for invalids an invalid home

Etymology: Fr invalide < L invalidus, feeble: see in- & valid

noun

a weak, sickly person; esp., one who is chronically ill or disabled

transitive verb

  1. to make invalid; disable or weaken
  2. Chiefly Brit. to remove (a soldier, sailor, etc.) from active duty or from a combat zone because of injury or illness
invalid2 definition

in·valid (in val′id)

adjective

not valid; having no force; null or void

Etymology: L invalidus

Related Forms:

  • invalidity in′·va·lid′·ity (in′və lid′ə tē) noun
  • invalidly in·val′·idly adverb

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