Source : Webster's Revised Unabridged Dictionary (1913)

Barker \Bark"er\, n.
   1. An animal that barks; hence, any one who clamors
      unreasonably.

   2. One who stands at the doors of shops to urg? passers by to
      make purchases. [Cant, Eng.]

   3. A pistol. [Slang] --Dickens.

   4. (Zo["o]l.) The spotted redshank.

Barker \Bark"er\, n.
   One who strips trees of their bark.

Source : WordNet®

barker
     n 1: someone who stands in front of a show (as at a carnival) and
          gives a loud colorful sales talk to potential customers
     2: informal terms for dogs [syn: {pooch}, {doggie}, {doggy}, {bow-wow}]