invalid

comparative more invalid · superlative most invalid

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

   This invalid contract cannot be legally enforced.

   1 more example

   Your argument is invalid because it uses circular reasoning.

   Synonyms: disallowed, nonvalid · Antonyms: valid

plural invalids

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

1. not comparableSuffering 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 Women: Figuring Feminine Illness in American Fiction and Culture, 1840-1940, University of North Carolina Press, →ISBN, page 1

2. not comparableIntended for use by an invalid.

present singular third person invalids · participle present invaliding · participle past invalided · past invalided

1. UKtransitiveTo exempt from (often military) duty because of injury or ill health.

   He was invalided home after the car crash.

   2 more examples

   [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 2, Richard Curtis, Ben Elton, “Goodbyeee”, in Blackadder Goes Forth

   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 remains of an explosion. If he'd lost a third, he would've been invalided out of military service. Thus, by the retention of a single digit would there be rather large consequences a few decades later on down the line.

   2019 September 18, Drachinifel, 26:33 from the start, in Battle of Tsushima - When the 2nd Pacific Squadron thought it couldn't get any worse..., archived from the original on 04 Dec 2022

2. transitiveTo make invalid or affect with disease.