Definitions of adversarial system
a judicial system usually associated with common law jurisdictions in which the opposing parties present evidence and cross-examine witnesses, and where the judge's role is generally limited to ruling on the law.
We have what is known as an adversarial system of justice. Legal cases are contests between opposing sides, and legal arguments will be fully and forcefully presented.
a system in which one party argues against another party during a debate, hearing, or other forum in an effort to win a case, vote, or argument etc
It sets up an adversarial system that has already failed in many newsrooms.