high priest

Definition

The term "high priest" refers to a special priest who was appointed to serve for one year as the leader of all the other Israelite priests.

The high priest had special responsibilities. He was the only one who was permitted to go into the most holy part of the temple to offer a special sacrifice once a year.
The Israelites had many priests, but only one high priest at a time.
When Jesus was being arrested, Caiaphas was the official high priest. Caiphas' father-in-law Annas is also mentioned sometimes because he was a former high priest who probably still had power and authority over the people.

"High priest" could be translated as "supreme priest" or "highest ranking priest."
Make sure this term is translated differently from the term "chief priest."