Antagonist

Antagonist - Other Definitions

• (n.) One who contends with another, especially in combat; an adversary; an opponent.
  
  
• (n.) A muscle which acts in opposition to another; as a flexor, which bends a part, is the antagonist of an extensor, which extends it.
  
  
• (n.) A medicine which opposes the action of another medicine or of a poison when absorbed into the blood or tissues.
  
  
• (a.) Antagonistic; opposing; counteracting; as, antagonist schools of philosophy.