deaf          
 adjective uk/def/ us/def/
B1 耳聋的,听不见的,失聪的
unable to hear, either completely or partly
  He's been totally/partially deaf since birth. 他生下来就完全失聪/有些听力障碍。 
  disapproving不愿听的;充耳不闻的 
unwilling to listen
  The local council has remained deaf to all the objections to its proposals. 当地议会对反对其提案的各种声音充耳不闻。 
 - More examples
- Her father's going deaf.
- She's deaf in her left ear.
- She is deaf, but refuses to let her disability prevent her from doing what she wants to do.
- "Didn't you realize she was deaf?" "Of course I did."
- He's been deaf and dumb since birth.
Idioms     
(as) deaf as a postidiom  informal 一点儿也听不见,完全失聪
completely deaf
  Grandad's as deaf as a post. 爷爷一点儿声音也听不见了。 
 there's none so deaf as those who will not hearidiom  saying 无心听者耳最聋
said about someone who chooses to ignore advice or will not believe what they are told
 deaf      
noun [ plural ] uk/def/ us/def/
the deaf 聋人,耳聋者,失聪人士
people who are unable to hear
  Many of the TV programmes are broadcast with subtitles for the deaf. 许多电视节目播出时都打上给失聪人士看的字幕。