opponent

1 of 2

noun

op·​po·​nent ə-ˈpō-nənt 

1

: one that takes an opposite position (as in a debate, contest, or conflict)

She is a formidable opponent in the race for senator.

opponents of the war

2

: a muscle that opposes or counteracts and limits the action of another

opponent

2 of 2

adjective

1

: antagonistic, opposing

2

: situated in front

Synonyms

Noun

• foe
• rival
• adversary

Examples of opponent in a Sentence

Noun

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.

Recent Examples on the Web

Noun

As the other undefeated team, Canada outscored its three opponents 19-4, but had to rely on some third-period outbursts to run up those offensive numbers. —Carol Schram, Forbes.com, 14 Aug. 2025

On the ball, Maresca’s preference is for his side to build with short passes from his goalkeeper, often with the aim of baiting opponents into a press that creates space higher up the pitch. —Mark Carey, New York Times, 14 Aug. 2025

Adjective

Instead, this is an ice hockey-style slide-and-bump affair; hitting an opponent from the side simply gives an annoying temporary jolt (which also disrupts their shooting motion) while hitting an opponent head-on forces a loose ball turnover and a mad scramble for the ball. —Kyle Orland, ArsTechnica, 13 Aug. 2025

Transgender rights supporters and opponent rally outside of the U.S. Supreme Court as the high court hears arguments in a case on transgender health rights on December 04, 2024 in Washington, DC. —Nick Mordowanec barney Henderson, MSNBC Newsweek, 18 June 2025

Word History

Etymology

Noun

borrowed from Medieval Latin oppōnent-, oppōnens "one who proposes something for discussion," from present participle of Latin oppōnere "to place as an obstacle, set in opposition to, argue in reply" — more at oppose

Adjective

borrowed from Latin oppōnent-, oppōnens, present participle of oppōnere "to place as an obstacle, set in opposition to, argue in reply" — more at oppose

First Known Use

Noun

1553, in the meaning defined at sense 1

Adjective

1647, in the meaning defined at sense 1

Rhymes for opponent

• component
• deponent
• exponent
• proponent
• multicomponent
• ponent

Kids Definition

opponent

noun

op·​po·​nent

ə-ˈpō-nənt

: a person or thing that opposes another

Medical Definition

opponent

noun

op·​po·​nent ə-ˈpō-nənt 

: a muscle that opposes or counteracts and limits the action of another