Darth Vader is an example of an antagonist to Luke Skywalker.
- a person who opposes or competes with another; adversary; opponent
- a muscle that counteracts or opposes the action of another muscle (called the agonist)
- a substance in the body, or a drug, that counteracts or blocks the effect of another substance or drug (called the agonist)
- One who opposes and contends against another; an adversary.
- The principal character in opposition to the protagonist or hero of a narrative or drama.
- Physiology A muscle that counteracts the action of another muscle, the agonist.
- A drug or chemical substance that interferes with the physiological action of another, especially by combining with and blocking its receptor.
- An opponent or enemy.
- One who antagonizes or stirs.
- (biochemistry) A chemical that binds to a receptor but does not produce a physiological response, blocking the action of agonist chemicals.
- The main character or force opposing the protagonist in a literary work or drama.
- (anatomy) A muscle that acts in opposition to another.
- A flexor, which bends a part, is the antagonist of an extensor, which extends it.
From Latin antagonista, from Ancient Greek ἀνταγωνιστής (antagōnistēs, “opponent”) (ἀντί (anti, “against”) + ἀγωνιστής (agōnistēs, “a combatant, pleader, actor”)), from ἀνταγωνίζεσθαι (antagōnizesthai, “antagonize”).