Term of Art: Antagonist

“Antagonist: In drama or fiction, the antagonist opposes the hero or protagonist (q.v.). In Othello, Iago is the antagonist to the Moor. In The Mayor of Casterbridge, Farfrae is antagonist to Henchard.”

Excerpted from: Cuddon, J.A. The Penguin Dictionary of Literary Terms and Literary Theory. New York: Penguin, 1992.