Pronunciation: /ˈdɛf(ə)n/
verb
[with object]-
cause (someone) to lose the power of hearing permanently or temporarily: we were deafened by the explosion
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(of a loud noise) overwhelm (someone) with sound: he was deafened by lorry traffic
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(deafen someone to) cause someone to be unaware of (other sounds): the noise deafened him to Ron’s approach