high priest

Short definition from Wiktionary

Noun

1. 1
   A clergyman with a higher function than a normal priest.
2. 2
   In the Bible, the male individual who was responsible for making the annual sacrifice on the Day of Atonement (Yom Kippur); always a descendant of Aaron, the older brother of Moses. See Kohen Gadol.
3. 3
   Jesus Christ.
4. 4
   The second-lowest office in the Melchizedek priesthood.
5. 5
   A person holding a position of power or influence; an authority in a field of study, doctrine, art or a movement.
6. 6
   A second or third degree male witch in Wicca.