Kohen is the Hebrew word for "priest", used in reference to the Aaronic priesthood, also called Aaronites or Aaronides. They are traditionally believed and halakhically required to be of direct patrilineal descent from the biblical Aaron, brother of Moses, and thus belong to the Tribe of Levi.
The high priest in his golden garments (the chain censer depicted is anachronistic).
The priestly breastplate of the high priest.
Kohen, Kohen Gadol and a Levite (Charles Foster, 1873)
A group of kohanim studying the Mishnayot laws of Keilim in anticipation of the rebuilding of the Beit Hamikdash
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 to such persons collectively. A priest may have the duty to hear confessions periodically, give marriage counseling, provide prenuptial counseling, give spiritual direction, teach catechism, or visit those confined indoors, such as the sick in hospitals and nursing homes.
Catholic priests in Rome, Italy, 2005
A vajracharya (thunderbolt-carrier), a Newar Buddhist priest
Bronze statue of an Egyptian priest, 6th c. BCE, Ephesus Archaeological Museum
Vestal Virgin priestess of Ancient Rome