|1.||[ noun ] (medicine) someone who is incapacitated by a chronic illness or injury|
|Related terms:||sick_person homebound|
|2.||[ adjective ] no longer valid|
"the license is invalid"
|3.||[ verb ] (work) force to retire, remove from active duty, as of firemen|
|4.||[ adjective ] having no cogency or legal force|
"invalid reasoning" "an invalid driver's license"
|Related terms:||valid nugatory false invalidated bad sophistic specious fallacious illegitimate|
|5.||[ verb ] injure permanently|
|Synonyms:||handicap incapacitate disable|
"He was disabled in a car accident"
|Related terms:||injure hock disability|