WordWeb Online

1. Diminished in strength, quality, or utility
   "impaired eyesight"
    
2. Mentally or physically unfit
   - afflicted

1. Make worse or less effective
   "His vision was impaired"
    
2. Make imperfect
   - mar, spoil, deflower, vitiate

See also: anosmic, broken, damaged, dickey [Brit], dicky [Brit], diminished, dysfunctional, dyslectic, dyslexic, impairer, impairment, injured, lessened, unfit, vitiated, weakened

Type of: damage

Antonym: unimpaired

Encyclopedia: Impaired