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English definition of “impair”

impair

verb [T] uk   /ɪmˈpeər/ us    /-ˈper/
to spoil something or make it weaker so that it is less effective: A recurring knee injury may have impaired his chances of winning the tournament.Damaging and spoilingDestroying and demolishing
impaired
adjective uk   /-ˈpeəd/ us    /-ˈperd/
She suffers from impaired vision/hearing.In bad condition
(Definition of impair from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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