invalid

About 4.37 uses per million words.

Meaning

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

   Your argument is invalid because it uses circular reasoning.

2. noun Any person with a disability or illness.
3. noun 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.
4. noun A disabled member of the armed forces; one unfit for active duty due to injury.
5. adjective Suffering from disability or illness.
6. adjective Intended for use by an invalid.
7. verb To exempt from (often military) duty because of injury or ill health.

   He was invalided home after the car crash.

8. verb To make invalid or affect with disease.

Similar words

invalidated unsound false null void bad uncollectible nullified expired nugatory

Often followed by

and because for in as or by under if

Word family

invalided invaliding invalidly invalids