Definition - A nickname that describes the thing that is being named.

Example -

(1) The Great Communicator (Ronald Reagan)
(2) The Sultan of Swat (Babe Ruth)

Etymology -
The word ultimately derives from the Greek epitheton (from epi, in addition + tithenai, to put).

Oxford English Dictionary -
Its first citation is from 1579:
"Christen them by names and epithites nothing agreeable or appliante to the thinges themselves."
(G. Harvey Letter-bk. (1884) 61 )

Please comment