Person who consecrates his life to some divinity and whose main functions are to direct religious rites and offer sacrifices to the divinity
A priest is a religious leader authorized to perform the sacred rituals of a religion, especially as a mediatory agent between humans and one or more deities. They also have the authority or power to administer religious rites; in particular, rites of sacrifice to, and propitiation of, a deity or deities. Their office or position is the "priesthood", a term which also may apply... Wikipedia