a person, group, or force that opposes or attacks; opponent; enemy; foe.
a person, group, etc., that is an opponent in a contest; contestant.
the Adversary,the devil; Satan.
adjective Also especially British, ad·ver·sar·i·al[ad-ver-sair-ee-uhl]/ˌæd vərˈsɛər i əl/.
of or relating to an adversary.
involving adversaries, as plaintiff and defendant in a legal proceeding: an adversary trial.
Origin of adversary
1300–50;Middle Englishadversarie < Latinadversārius, equivalent to advers(us) (see adverse) + -ārius-ary; replacing Middle Englishadversere < Anglo-French
Related formsad·ver·sar·i·ness, nounnon·ad·ver·sar·i·al, adjective
1. Adversary,antagonist mean a person or a group contending against another. Adversary suggests an enemy who fights determinedly, continuously, and relentlessly: a formidable adversary.Antagonist suggests one who, in hostile spirit, opposes another, often in a particular contest or struggle: a duel with an antagonist.
mid-14c., aduersere, from Anglo-French adverser (13c.), Old French adversaire "adversary, opponent, enemy," or directly from Latin adversarius "opponent, adversary, rival," noun use of adjective meaning "opposite, hostile, contrary," literally "turned toward one," from adversus "turned against" (see adverse). The Latin word is glossed in Old English by wiðerbroca.