The system of law, as exists in the Anglo-American world, where an issue is argued in court by two opposing sides, the prosecutor or plaintiff, and the defence. Opposite to the Inquisitorial system where a judge or panel of judges call evidence and interrogate witnesses, as exists in many European countries. 

the kind of lawful operating system, such as America, which concerns the argument over counteractive persons being recognized by a separate judge. In numerous countries in Europe, but not in the UK an [..]

  An adversarial political system is one dominated by a struggle for power between two rival party groupings.  Under such a system, politics is seen as highly competitive with little room for compromise.  Actions by the governing party are always opposed by rival parties.  See also consensus; majoritarian.

Adversary system or adversarial system is the legal system followed in the US. Under this system, the parties to a case develop and present their arguments, gather and submit evidence, call and questi [..]

The adversarial system is a system of law derived from medieval ‘trial by combat’. In adversarial systems, two advocates (usually lawyers or barristers) present arguments and evidence on behalf of the [..]

A legal system of common law origin where two parties advocate opposing positions and a neutral finder of fact such as a judge or jury determines the truth in the matter.    Last Updated:  7/8/2015    [..]

System of justice in which cases are argued by two opposing sides, the prosecution and the defence, both of which are responsible for fully and forcefully presenting their respective positions; cases [..]

(legal) A system of law in which advocates represent the prosecution and the defence and an impartial person (judge) or people (jury) determine the truth of the matter