Ĭn’ter-vĕn’tion, n.

n. [Lat. interventio, Fr. intervention, Sp. intervencion, It. intervenzione. See supra.]

1. The act of intervening; interposition.
2. Any interference that may affect the interests of others; especially, of one or more states with the affairs of another; mediation.

Let us decide our quarrels at home, without the intervention of a foreign power. Temple. 3. (Civil Law.) The act by which a third person, to protect his own interest, interposes and becomes a party to a suit pending between other parties.