Simple Definition of opponent
: a person, team, group, etc., that is competing against another in a contest
: a person, group, etc., that is against something (such as an action, law, or system) : someone or something that does not want something to exist, be done, etc.
Examples of opponent in a sentence
She is a formidable opponent in the race for senator.
The team's opponents have not lost a game this season.
He knocked out his opponent in the third round.
Origin of opponent
Latin opponent-, opponens, present participle of opponere
First Known Use: 1560
First Known Use of opponent
OPPONENT Defined for Kids
Definition of opponent for Students
: a person or thing that takes an opposite position in a contest, fight, or controversy
Medical Definition of opponent
: a muscle that opposes or counteracts and limits the action of another
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