n. | 1. | One who contends with another, especially in combat; an adversary; an opponent. |
2. | (Anat.) A muscle which acts in opposition to another; | |
3. | (Med.) A medicine which opposes the action of another medicine or of a poison when absorbed into the blood or tissues. | |
a. | 1. | Antagonistic; opposing; counteracting; |
Noun | 1. | ![]() Antonyms: agonist - someone involved in a contest or battle (as in an agon) |
2. | antagonist - a muscle that relaxes while another contracts; "when bending the elbow the triceps are the antagonist" | |
3. | antagonist - a drug that neutralizes or counteracts the effects of another drug Antonyms: synergist - a drug that augments the activity of another drug |