Source : Webster's Revised Unabridged Dictionary (1913)

Talker \Talk"er\, n.
   1. One who talks; especially, one who is noted for his power
      of conversing readily or agreeably; a conversationist.

            There probably were never four talkers more
            admirable in four different ways than Johnson,
            Burke, Beauclerk, and Garrick.        --Macaulay.

   2. A loquacious person, male or female; a prattler; a
      babbler; also, a boaster; a braggart; -- used in contempt
      or reproach. --Jer. Taylor.

Source : WordNet®

talker
     n : someone who expresses in language; someone who talks
         (especially someone who delivers a public speech or
         someone especially garrulous); "the speaker at
         commencement"; "an utterer of useful maxims" [syn: {speaker},
          {utterer}, {verbalizer}, {verbaliser}]