Members of the parties is a lawsuit: part and counterpart. Plaintiff and defendant, plaintiff and defendant. Other party in a case or lawsuit. Opponent, adversary, rival, antagonistic, antagonist, opposite.
It is a term used in the legal field, and more specifically, in procedural, to refer to the opposing party in a lawsuit, and defends the position opposite to the other party and that, therefore, opposed to their interests.
The opposing party ( 41 legal meaning;