- The definition of impair is to hinder or weaken something.
When drinking alcohol causes your reflexes to become slower, this is an example of how drinking impairs your reflexes.
impair definition by Webster's New World
Origin: Middle English empeiren ; from Old French empeirer ; from Vulgar Latin an unverified form impejorare ; from Classical Latin in-, intensive plush Late Latin pejorare, to make worse: see pejorative
- impairment noun
impair definition by American Heritage Dictionary
transitive verb im·paired, im·pair·ing, im·pairs
Origin: Middle English empairen, from Old French empeirer, from Vulgar Latin *impēiōrāre : Latin in-, causative pref.; see in-2 + Late Latin pēiōrāre, to worsen (from Latin pēior, worse; see ped- in Indo-European roots).
- im·pairˈment noun
impair - Legal Definition