noun the act of intervening (as to mediate a dispute, etc.).
— synonyms: intercession
noun a policy of intervening in the affairs of other countries.
— synonyms: interference
noun the act or fact of interposing one thing between or among others.
— synonyms: interposition
noun (law) a proceeding that permits a person to enter into a lawsuit already in progress.
noun care provided to improve a situation (especially medical procedures or applications that are intended to relieve illness or injury).
— synonyms: treatment