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adversary

American  
[ad-ver-ser-ee] / ˈæd vərˌsɛr i /

noun

plural

adversaries
  1. a person, group, or force that opposes or attacks; opponent; enemy; foe.

    Antonyms:
    ally
  2. a person, group, etc., that is an opponent in a contest; contestant.

  3. the Adversary, the devil; Satan.


adjective

  1. of or relating to an adversary.

  2. involving adversaries, as plaintiff and defendant in a legal proceeding.

    an adversary trial.

adversary British  
/ ˈædvəsərɪ /

noun

  1. a person or group that is hostile to someone; enemy

  2. an opposing contestant in a game or sport

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

adjective

  1. the US term for adversarial

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Related Words

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.

Other Word Forms

  • adversariness noun
  • nonadversarial adjective

Etymology

Origin of adversary

First recorded in 1300–50; Middle English adversarie, from Latin adversārius; equivalent to adverse + -ary; replacing Middle English adversere, from Anglo-French

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Europe has likewise agreed to buy $750 billion of U.S. energy to reduce their dependence on foreign adversaries.

From The Wall Street Journal

On the opposite side, these scientists used the flight behavior of doves to train the attacking drones how to dodge their hawk-trained adversaries.

From The Wall Street Journal

Iran's naval crews have focussed much of their training on unconventional or "asymmetric" warfare, looking at ways to overcome or bypass the technical advantages enjoyed by their primary adversary, the US Navy's Fifth Fleet.

From BBC

The reluctant superhero then sets off on a quest to face “an unexpected and ruthless adversary,” according to the movie’s logline.

From Los Angeles Times

Even adversaries acknowledge him to be a decent guy.

From The Wall Street Journal