Druid, member of the learned class among the ancient Celts. They acted as priests, teachers, and judges. The earliest known records of the Druids come from the 3rd century bce. Their name may have come from a Celtic word meaning “knower of the oak tree.” Very little is known for certain about the Druids, who kept no records of their own.
According to Julius Caesar, who is the principal source of information about the Druids, there were two groups of men in Gaul that were held in honour, the Druids and the noblemen (equites). Caesar related that the Druids took charge of public and private sacrifices, and many young men went to them for instruction. They judged all public and private quarrels and decreed penalties. If anyone disobeyed their decree, he was barred from sacrifice, which was considered the gravest of punishments. One Druid was made the chief; upon his death, another was appointed. If, however, several were equal in merit, the Druids voted, although they sometimes resorted to armed violence. Once a year the Druids assembled at a sacred place in the territory of the Carnutes, which was believed to be the centre of all Gaul, and all legal disputes were there submitted to the judgment of the Druids.