[1] : The Collaborative International Dictionary of English v.0.48

talker \talk"er\, n.
   1. one who talks; especially, one who is noted for his power
      of conversing readily or agreeably; a conversationist.
      1913 webster

            there probably were never four talkers more
            admirable in four different ways than johnson,
            burke, beauclerk, and garrick.        --macaulay.
      1913 webster

   2. a loquacious person, male or female; a prattler; a
      babbler; also, a boaster; a braggart; -- used in contempt
      or reproach. --jer. taylor.
      1913 webster

[2] : WordNet (r) 2.0

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
see also:
speaker utterer verbalizer verbaliser 

[3] : Moby Thesaurus II by Grady Ward, 1.0

46 moby thesaurus words for "talker":
   blatherskite, blowhard, blusterer, chatterbox, collocutor,
   colloquialist, conversational partner, conversationalist,
   converser, debater, declaimer, demagogue, dialogist, discourser,
   gasbag, haranguer, interlocutor, interlocutress, interlocutrice,
   interlocutrix, jawsmith, keynoter, lecturer, orator, palaverer,
   panelist, parleyer, patterer, public speaker, rabble-rouser,
   ranter, sayer, show-off, speaker, speecher, speechifier,
   speechmaker, spellbinder, spieler, spokesman, spokeswoman, spouter,
   swaggerer, tub-thumper, utterer, windbag

Talker >> T Words
Talker, definition of term: Talker
talker_pag1.html

Talker System >> T Words
Talker System, definition of term: Talker System
talker+system_pag1.html