invalid

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

Adjective not comparable

  1. Suffering from disability or illness.
    • Invalidism therefore referred to a lack of power as well as a tendency toward illness. It is for this reason that I choose to discuss the invalid woman rather than just the ill one. - 2000, Diane Price Herndl, Invalid...
  2. Intended for use by an invalid.

Origin

Etymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Italic *n̥- Latin in- Proto-Indo-European *h₂welh₁- Proto-Indo-European *h₂wl̥h₁éh₁yeti Proto-Italic *walēō Latin valeō Proto-Indo-European *dʰeh₁-der. Proto-Italic *-iðos Latin -idus Latin validus Latin invalidusbor. Middle French invalidebor. English invalid Borrowed from Middle French invalide, from Latin invalidus (“infirm, weak”), from in- (“not”) + validus (“strong”).

Adjective Entry 2

  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: disallowed nonvalid

    Antonyms: valid

Origin

Etymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Italic *n̥- Latin in-bor. Middle English in- English in- Proto-Indo-European *h₂welh₁- Proto-Indo-European *h₂wl̥h₁éh₁yeti Proto-Italic *walēō Latin valeō Proto-Indo-European *dʰeh₁-der. Proto-Italic *-iðos Latin -idus Latin validusder. Middle French validebor. English valid English invalid From in- + valid.

Forms

more invalid most invalid

Derived

invalidity invalidly invalidness

Noun

  1. Any person with a disability or illness.
  2. 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. A disabled member of the armed forces; one unfit for active duty due to injury.

Forms

invalids

Derived

fabulous invalid invalid carriage invalid chair invalidhood invalidish invalidism invalid stout semi-invalid

Verb

  1. To exempt from (often military) duty because of injury or ill health.
    • He was invalided home after the car crash.
    • [Blackadder:] Right, Baldrick, this is an old trick I picked up in the Sudan. We tell HQ that I’ve gone insane, and I’ll be invalided back to Blighty before you can say "wibble" — a poor, gormless idiot. - 1989 November...
    • The Japanese armored cruiser Nisshin has been hit badly. Shells have sheared off several main guns and virtually disarmed the vessel. In the middle of all this, one Ensign Isoroku Yamamoto loses two fingers to the...
  2. To make invalid or affect with disease.

Forms

invalids invaliding invalided

Derived

invalid out