- The definition of an antagonist is a person or thing that competes with or goes against another.
Darth Vader is an example of an antagonist to Luke Skywalker.
antagonist definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
- a person who opposes or competes with another; adversary; opponent
- a muscle, drug, etc. that acts in opposition to or counteracts another
antagonist definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
- 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.
- Biochemistry A chemical substance that interferes with the physiological action of another, especially by combining with and blocking its nerve receptor.
- an·tagˌo·nisˈtic adjective
- an·tagˌo·nisˈti·cal·ly adverb
antagonist - Medical Definition
The American Heritage® Medical Dictionary Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Something, such as a muscle, disease, or physiological process, that neutralizes or impedes the action or effect of another.
antagonist - Science Definition
- A muscle that opposes the action of another muscle, as by relaxing while the other one contracts, thereby producing smooth, coordinated movement.
- A chemical substance, such as a drug, that interferes with the physiological action of another substance, especially by combining with and blocking its nerve receptor. Compare agonist.