having no cogency or legal force; invalid reasoning; an invalid driver's license'
invalid (adj.)
someone who is incapacitated by a chronic illness or injury
[ Syn: shut-in ]
invalid (n.)
no longer valid; the license is invalid'
invalid (adj.)
force to retire, remove from active duty, as of firemen
injure permanently; He was disabled in a car accident
[ Syn: disable , incapacitate , handicap ]