a person who actively opposes or is hostile to someone or something; an adversary.
"he turned to confront his antagonist"
synonyms: adversary · opponent · enemy · foe · nemesis · rival · competitor · contender · opposition · competition · the other side · corrival
- biochemistry a substance that interferes with or inhibits the physiological action of another.Compare with agonist.
- anatomy a muscle whose action counteracts that of another specified muscle.Compare with agonist.
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