📖 WordNook

invalid

adjective
  1. no longer valid
    “the license is invalid”
  2. having no cogency or legal force
    “invalid reasoning”
noun
  1. someone who is incapacitated by a chronic illness or injury
    shut-in
verb
  1. injure permanently
    handicapdisableincapacitate
  2. force to retire, remove from active duty, as of firemen