Invalid
WordNet
adjective
(1) No longer valid
"The license is invalid"
(2) Having no cogency or legal force
"Invalid reasoning"
"An invalid driver's license"
noun
(3) Someone who is incapacitated by a chronic illness or injury
verb
(4) Injure permanently
"He was disabled in a car accident"
(5) Force to retire, remove from active duty, as of firemen
WiktionaryText
Etymology
From from +
Adjective
Noun
- One who is confined to home or bed due to illness, disability or injury
- Any person with disability, e.g. invalid carriage
Usage notes
- The sense of a person confined to home or bed is considered politically incorrect by some.
Verb
- To exempt from duty because of injury or ill health
- He was invalided home after the car crash.