- (a.) Antagonistic; opposing; counteracting; as, antagonist schools of philosophy.
- (n.) A muscle which acts in opposition to another; as a flexor, which bends a part, is the antagonist of an extensor, which extends it.
- (n.) One who contends with another, especially in combat; an adversary; an opponent.
- (n.) A medicine which opposes the action of another medicine or of a poison when absorbed into the blood or tissues.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). antagonist. Retrieved September 24, 2026, from http://smartdefine.org/antagonist/definitions/1974214 |
| Chicago | Webster's. 2011. "antagonist" http://smartdefine.org/antagonist/definitions/1974214 (accessed September 24, 2026). |
| Harvard | Webster's 2011, antagonist, Smart Define, viewed 24 September, 2026, <http://smartdefine.org/antagonist/definitions/1974214>. |
| MLA | Webster's. "antagonist" 27 May 2011. Web. 24 September 2026. <http://smartdefine.org/antagonist/definitions/1974214> |