1. Someone who is a faker and a lier: The river boat gambler was an old-fashioned cozener who was always trying to take advantage of innocent travelers.
2. Anyone who acts with artful deceit; an impostor: The leader of the worship ceremony was in fact a cozener who was not licensed to preside over a church.
3. A person who misleads by fooling others into doing something that is illegal: Carol's cousin had a marriage ceremony that was performed by a cozener who was not authorized to perform such services.