Definition of "high priest"

high priest

noun
plural high priests
1. (religion) A clergyman with a higher function than a normal priest.
2. In the Bible, the male person 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.
3. (Christianity) Jesus Christ.
4. (Mormonism) The second-lowest office in the Melchizedek priesthood.
5. A person holding a position of power or influence; an authority in a field of study, doctrine, art or a movement.
  Quotations
  The global economic collapse of 2007-2008 discredited “rational expectations” economics (though its high priests have yet to recognize this) and brought both Keynes and Hayek back into posthumous contention.
  2011, Robert Skidelsky, The Keynes-Hayek Rematch
  The high priest of US arms controllers
  2020 June 23, John Bolton, The Room Where It Happened: A White House Memoir, New York, N.Y.: Simon & Schuster, page 172
6. (Wicca) A second or third degree male witch in Wicca.