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1. Someone who is incapacitated by a chronic illness or injury
   - shut-in

1. Force to retire, remove from active duty, as of firemen
    
2. Injure permanently
   "He was invalided in a car accident";
   - disable, incapacitate, handicap

1. Having no cogency or legal force
   "invalid reasoning"; "an invalid driver's licence"
    
2. No longer valid
   "the licence is invalid"

Derived forms: invalided, invaliding, invalids

See also: bad, expired, fallacious, false, illegitimate, invalidated, null, null and void, nullified, sophistic, sophistical, uncollectible, unsound, void

Type of: diseased person, injure, remove, sick person, sufferer, wound

Antonym: valid

Part of: homebound

Encyclopedia: Invalid