| Intervention 1. (n.) The act of intervening; interposition. 2. (n.) Any interference that may affect the interests of others; especially, of one or more states with the affairs of another; mediation. 3. (n.) The act by which a third person, to protect his own interest, interposes and becomes a party to a suit pending between other parties. Thesaurus Entries encroachment, entrance, entrenchment, impingement, imposition, incursion, infiltration, influx, infringement, injection, inroad, insinuation, interagency, intercession, intercurrence, interference, interjacence, interjection, interlocation, interloping, intermediacy, intermediation, interposition, interposure, interruption, intervenience, intrusion, invasion, involvement, irruption, mediation, obtrusion, sandwiching, stepping in, trespass, trespassing, unlawful entry |