- 1deafen somebody to make somebody unable to hear the sounds around them because there is too much noise The noise of the siren was deafening her.
- 2deafen somebody to make somebody deaf
BrE BrE//ˈdefn//; NAmE NAmE//ˈdefn//[usually passive]Verb Forms present simple I / you / we / they deafen
BrE BrE//ˈdefn//; NAmE NAmE//ˈdefn//he / she / it deafens
BrE BrE//ˈdefnz//; NAmE NAmE//ˈdefnz//past simple deafened
BrE BrE//ˈdefnd//; NAmE NAmE//ˈdefnd//past participle deafened
BrE BrE//ˈdefnd//; NAmE NAmE//ˈdefnd//-ing form deafening
BrE BrE//ˈdefnɪŋ//; NAmE NAmE//ˈdefnɪŋ//