Someone or something who barks.
My neighbor's dog is a constant barker that keeps me awake at night.
A person employed to solicit customers by calling out to passersby, e.g. at a carnival.
Bob had amassed a considerable stockpile of double entendres from his days working as a barker for a strip joint.
A shelf-talker.
A video game mode where the action is demonstrated to entice someone to play the game.
The barker mode of the arcade video game convinced the teenager to spend a quarter.
A pistol.
The spotted redshank.
A person who removes needed or valuable tree bark, as on a cinnamon or cinchona plantation.
The professor of barker has been made largely obsolete by the realization that in most cases saplings can be cultivated far more profitably.
A tanner.
The profession of barker has been made largely obsolete by the introduction of more effective tanning agents, but it lives on as a surname.
A machine used to remove unneeded bark from wood.
Run these logs through the barker so we can use them as fence posts.