Source : Webster's Revised Unabridged Dictionary (1913)

Deaf \Deaf\ (?; 277), v. t.
   To deafen. [Obs.] --Dryden.

Deaf \Deaf\ (?; 277), a. [OE. def, deaf, deef, AS. de['a]f; akin
   to D. doof, G. taub, Icel. daufr, Dan. d["o]v, Sw. d["o]f,
   Goth. daubs, and prob. to E. dumb (the original sense being,
   dull as applied to one of the senses), and perh. to Gr. ?
   (for ?) blind, ? smoke, vapor, folly, and to G. toben to
   rage. Cf. {Dum}b.]
   1. Wanting the sense of hearing, either wholly or in part;
      unable to perceive sounds; hard of hearing; as, a deaf
      man.

            Come on my right hand, for this ear is deaf. --Shak.

   2. Unwilling to hear or listen; determinedly inattentive;
      regardless; not to be persuaded as to facts, argument, or
      exhortation; -- with to; as, deaf to reason.

            O, that men's ears should be To counsel deaf, but
            not to flattery!                      --Shak.

   3. Deprived of the power of hearing; deafened.

            Deaf with the noise, I took my hasty flight.
                                                  --Dryden.

   4. Obscurely heard; stifled; deadened. [R.]

            A deaf murmur through the squadron went. --Dryden.

   5. Decayed; tasteless; dead; as, a deaf nut; deaf corn. [Obs.
      or Prov. Eng.] --Halliwell.

            If the season be unkindly and intemperate, they
            [peppers] will catch a blast; and then the seeds
            will be deaf, void, light, and naught. --Holland.

   {Deaf and dumb}, without the sense of hearing or the faculty
      of speech. See {Deaf-mute}.

Source : WordNet®

deaf
     n : people who have severe hearing impairments; "many of the
         deaf use sign language"

deaf
     adj 1: lacking or deprive of the sense of hearing wholly or in part
            [ant: {hearing(a)}]
     2: (usually followed by `to') unwilling or refusing to pay
        heed; "deaf to her warnings" [syn: {deaf(p)}, {indifferent(p)}]

deaf
     v : make or render deaf; "a deafening noise" [syn: {deafen}]