In`ter*ven"tion (?), n. [L. interventio an interposition: cf. F. intervention.]
The act of intervening; interposition.
Sound is shut out by the intervention of that lax membrane.
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 any foreign power.
Sir W. Temple.
The act by which a third person, to protect his own interest, interposes and becomes a party to a suit pending between other parties.
© Webster 1913.