名詞 deaf:

1. people who have severe hearing impairments

動詞 deaf:

1. make or render deaf
   同義詞：deafen

形容詞 deaf:

1. lacking or deprive of the sense of hearing wholly or in part
2. (usually followed by `to') unwilling or refusing to pay heed
   同義詞：indifferent

1. I'm a little deaf, please articulate your words carefully.
   我有些耳聾，請把話仔細(xì)地說清楚。
2. He was deaf to my supplication.
   我懇求他，他連理都不理。
3. He's a deaf mute and cannot tell anyone secret.
   他是個聾啞人，不會把他們的秘密告訴任何人。
4. The leader was deaf to all entreaties.
   領(lǐng)導(dǎo)對一切懇求都置若罔聞。
5. He is deaf in one ear.
   他有一只耳朵是聾的。
6. She turned a deaf ear to our warnings and got lost.
   她對我們的警告充耳不聞，結(jié)果迷失了方向。
7. He turned a deaf ear to all requests for help.
   他不理會一切求援的呼吁。

deaf

adj.（形容詞）
deaf.er,deaf.est
Partially or completely lacking in the sense of hearing.
聾的，重聽的：部分或完全喪失聽覺的
Deaf Of or relating to the Deaf or their culture.
Deaf 聾人的，聾人文化的：聾人的或聾人的文化的，或與其相關(guān)的
Unwilling or refusing to listen; heedless:
充耳不聞的：不愿聽的，拒絕聽的；不注意的：
例句：
was deaf to our objections.
對我們的異議充耳不聞

n.(used with a pl. verb)（名詞）（與復(fù)數(shù)動詞連用）
Deaf people considered as a group.
聾子：被看作一個群體的所有聾人
Deaf The community of deaf people who use American Sign Language as a primary means of communication.
Deaf 聾人團(tuán)體：指聾人的團(tuán)體，他們的主要的交流方式之一就是使用美國手勢語言

來源：
Middle English def, deef
中古英語 def, deef
from Old English dôaf
源自 古英語 dôaf

【引伸】
deaf.ly
adv.（副詞）
deaf.ness
n.（名詞）
Some writers have lately introduced a distinction between the lowercase noundeaf, which is used to refer simply to people with extensive hearing disorders, and the capitalized noun Deaf, which refers to the culture and community that has grown up around the use of American Sign Language as a primary means of communication.
最近，一些作家提出小寫的名詞deaf 和大寫的名詞 Deaf 之間的一個不同點(diǎn)，前者僅用于指全面聽力障礙的人；而后者指一種文化和一個團(tuán)體， 他們通過把美國手勢語言作為首要使用的交流方式而逐漸形成的