What is Adversary Proceeding?

Alternative Forms: Adversary proceedings
Legal Definition
One having opposing parties; contested, as distinguished from an ex parte application; one of which the party seeking relief has given legal warning to the other party, and afforded the latter an opportunity to contest it.
-- Black's Law Dictionary
Legal Definition
A hearing before a judge or other neutral person, with competing arguments from opposing parties.
Legal Definition
Any action in law where there are opposing parties.