Definition of hearing aid noun from the Oxford Advanced Learner's Dictionary


hearing aid

BrE BrE//ˈhɪərɪŋ eɪd//
; NAmE NAmE//ˈhɪrɪŋ eɪd//
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a small device that fits inside the ear and makes sounds louder, used by people who cannot hear well to have/wear a hearing aid
See the Oxford Advanced American Dictionary entry: hearing aid