Antagonist — Defs

01 n. One who contends with another, especially in combat; an adversary; an opponent.

1.
One who contends with another, especially in combat; an adversary; an opponent.
“Antagonist of Heaven's Almighty King.” — Milton.

“Our antagonists in these controversies.” — Hooker.
2.
A muscle which acts in opposition to another; as a flexor, which bends a part, is the antagonist of an extensor, which extends it.(Anat.)
3.
A medicine which opposes the action of another medicine or of a poison when absorbed into the blood or tissues.(Med.)

Syn. Adversary; enemy; opponent; foe; competitor. See Adversary.

02 a. Antagonistic; opposing; counteracting; as, antagonist schools of philosophy.

1.
Antagonistic; opposing; counteracting; as, antagonist schools of philosophy.