| n. | 1. | One who contends for the prize in public games. |
| Noun | 1. | agonist - the principal character in a work of fiction Synonyms: protagonist |
| 2. | agonist - someone involved in a contest or battle (as in an agon) Antonyms: | |
| 3. | agonist - a muscle that contracts while another relaxes; "when bending the elbow the biceps are the agonist" | |
| 4. | agonist - (biochemistry) a drug that can combine with a receptor on a cell to produce a physiological reaction |
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