Meaning of ANTAGONIST in English

ANTAGONIST

-_nə̇st noun

( -s )

Etymology: Late Latin antagonista, from Greek antagōnistēs, from antagōnizesthai

1.

a. : one that contends with or opposes another (as in a fight, conflict, or other contest) : opponent , adversary

completely vanquishing his antagonist

b. : the principal opponent or foil of the main character in a drama or narrative

the crook was the antagonist to the detective hero

— opposed to protagonist

2. : an agent that acts in physiological opposition

contact between a tooth and its antagonist in the opposing jaw

as

a. : a muscle that contracts with and limits the action of an agonist with which it is paired

b. : a drug that opposes the action on the organism of another drug by a physiological, chemical, or competitive mechanism

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.