Source : Webster's Revised Unabridged Dictionary (1913)

Numb \Numb\, a. [OE. nume, nome, prop., seized, taken, p. p. of
   nimen to take, AS. niman, p. p. numen. [root]7. See {Nimble},
   {Nomad}, and cf. {Benumb}.]
   1. Enfeebled in, or destitute of, the power of sensation and
      motion; rendered torpid; benumbed; insensible; as, the
      fingers or limbs are numb with cold. ``A stony image, cold
      and numb.'' --Shak.

   2. Producing numbness; benumbing; as, the numb, cold night.
      [Obs.] --Shak.

Numb \Numb\, v. t. [imp. & p. p. {Numbed}; p. pr. & vb. n.
   {Numbing}.]
   To make numb; to deprive of the power of sensation or motion;
   to render senseless or inert; to deaden; to benumb; to
   stupefy.

         For lazy winter numbs the laboring hand. --Dryden.

         Like dull narcotics, numbing pain.       --Tennyson.

Source : WordNet®

numb
     adj 1: lacking sensation; "my foot is asleep"; "numb with cold"
            [syn: {asleep(p)}, {benumbed}]
     2: (followed by `to') not showing human feeling or sensitivity;
        unresponsive; "passersby were dead to our plea for help";
        "numb to the cries for mercy" [syn: {dead(p)}, {numb(p)}]
     3: so frightened as to be unable to move; stunned or paralyzed
        with terror; "petrified with fear"; "she was petrified by
        the eerie sound"; "too numb with fear to move" [syn: {petrified}]

numb
     v : make numb or insensitive; "The shock numbed her senses"
         [syn: {benumb}, {blunt}, {dull}]