(1) "Adverse party" means a beneficially interested party to a judicial or administrative proceeding from which a mandamus proceeding arises, whose interests are adverse to the relator.
(2) "Counsel for defendant" means the attorney who appears on behalf of the defendant in a mandamus proceeding as provided in ORS 34.130 (4).
(3) "Defendant" means the court, corporation, board, officer or person against whom relief is sought in a mandamus proceeding.
(4) "Relator" means the beneficially interested party on whose relation a mandamus proceeding is brought. [1989 c.702 §2]