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
   - 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 No longer valid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: invalids, invaliding, invalided

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

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

Antonym: valid

Part of: homebound

Encyclopedia: Invalid

• phosphatase
• phosphate
• phosphate buffer solution
• phosphatic
• phosphaturia
• phosphene
• phosphide
• phosphine
• phosphite
• phosphocreatine
• phospholipid
• phosphonium
• phosphoprotein
• phosphor
• phosphor bronze
• phosphoresce
• phosphorescence
• phosphorescent
• phosphoric
• phosphoric acid
• phosphorite
• phosphorous
• phosphorous acid
• phosphorus
• phosphoryl