bark ‧ er /ˈbɑːkə $ ˈbɑːrkər/ BrE AmE noun [countable]
in the past, someone who stood outside a place where there was a ↑ circus or FAIR, shouting to people to come in
BARKER
Meaning of BARKER in English
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012