The definition of adversarial is anything related to a person, place, or thing where there is disagreement, opposition or where problems are created that go against a desired result.
An example of adversarial conditions are rain clouds rolling in when a picnic in the park was planned.
- of or characterized by opposition, disagreement, hostility, etc., as between adversaries
Relating to or characteristic of an adversary; involving antagonistic elements: “Some speakers fall almost willingly into an adversarial relationship with the audience” (Don Pfarrer).
(comparative more adversarial, superlative most adversarial)