co·me·di·an 
(kə-mēdē-ən)
(kə-mēdē-ən)n.
1. A professional entertainer who tells jokes or performs various other comic acts.
2. An actor in comedy.
3. A writer of comedy.
4. A person who amuses or tries to be amusing; a clown.
[French comédien, player, comedian, from comédie, comedy, from Medieval Latin cōmēdia; see COMEDY.]