Definitions of agonist
  1. noun
    someone involved in a contest or battle (as in an agon)
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    adversary, antagonist, opponent, opposer, resister
    someone who offers opposition
    type of:
    a person who participates in competitions
  2. noun
    the principal character in a work of fiction
    synonyms: protagonist
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    the main character who opposes the protagonist in a narrative or play
    example of:
    character, fictional character, fictitious character
    an imaginary person represented in a work of fiction (play or film or story)
    a protagonist who lacks the characteristics that would make him a hero (or her a heroine)
  3. noun
    a muscle that contracts while another relaxes
    “when bending the elbow the biceps are the agonist
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    type of:
    antagonistic muscle
    (physiology) a muscle that opposes the action of another
  4. noun
    (biochemistry) a drug that can combine with a receptor on a cell to produce a physiological reaction
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    type of:
    a substance that is used as a medicine or narcotic
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