opponent /əˈpəʊ.nənt/noun 5adjective 2forms 3 noun5 •someone who works or plays against another person, or who tries to stop a planThe person who ran against her in the last election proved to be a formidable opponent.During the crackdown, many opponents of the regime were arrested. •One who opposes another physically (in a fight, sport, game, or competition).In the Chariot-Race Achilles is represented as being able to conquer every Opponent […] — 1720 •One who opposes another in words (in a dispute, argument or controversy).It is easier to confound than to convince an opponent; the former may be effected by a turn that has more happiness than truth in it. — 1777 •One who is opposed or objects (to a policy, course of action or set of ideas).She was a dedicated opponent of the death penalty. •(historical) The participant who opens an academic debate by putting forward objections to a theological or philosophical thesis.We make the argument appere slender, when we receiue it laughyngly, and declare by wordes, euen at the first, that it is nothyng to the purpose, and so abashe the opponent. — 1551 adjective2 •(no longer used) Opposing; adverse; antagonistic.Young Ithacus advanc’d, defies the foe, Poising his lifted lance in act to throw: The savage renders vain the wound decreed, And springs impetuous with opponent speed! — 1726 •(no longer used) Situated in front; opposite.Her sympathizing Lover takes his Stand High on th’ opponent Bank […] — 1749 formsopponents · more opponent · most opponent