1) Ancient Greek theatre 
In Attic drama, Coryphaeus, or Koryphaios (Greek κορυφαῖος koryphaîos, from κορυφή koryphḗ́, the top of the head, and often corypheus in English) was the leader of the chorus. Hence the term (sometimes in an Anglicized form `coryphe`) is used for the chief or leader of any company or movement. The coryphaeus spoke for all the.....
spokesman; leader of a chorus
the leader of the chorus in the ancient Greek drama. · the leader of an operatic chorus or any group of singers.
(Latin; pl. coryphaeus: the leader of the chorus in ancient Greek drama). Greek: koryphaios.