invalid — English Dictionary

Adjective

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

   Synonyms

   disallowednonvalid

   Antonyms

   valid

   Examples

   Your argument is invalid because it uses circular reasoning.

   This invalid contract cannot be legally enforced.

Noun

1. Any person with a disability or illness.

   Usage

   • Dated
   • Offensive
   • sometimes

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.

   Usage

   • Dated
   • Offensive
   • sometimes

3. A disabled member of the armed forces; one unfit for active duty due to injury.

   Usage

   • Archaic

Adjective

1. Suffering from disability or illness.

   Usage

   • not-comparable

   Examples

   More examples (1)

   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.

2. Intended for use by an invalid.

   Usage

   • not-comparable

Verb

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

   Usage

   • UK usage
   • Transitive

   Examples

   He was invalided home after the car crash.

   More examples (2)

   [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.

   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.

2. To make invalid or affect with disease.

   Usage

   • Transitive

Adjective

1. having no cogency or legal force

   Antonyms

   valid

   Examples

   invalid reasoning

   an invalid driver's license

2. no longer valid

   Examples

   the license is invalid

Noun

1. someone who is incapacitated by a chronic illness or injury

   Synonyms

   shut-in

   Broader terms

   sick persondiseased personsufferer

Verb

1. force to retire, remove from active duty, as of firemen

   Broader terms

   remove

2. injure permanently

   Synonyms

   disableincapacitatehandicap

   Broader terms

   injurewound

   Examples

   He was disabled in a car accident