Intervene

[imp. & p. p. INTERVENED; p. pr. & vb. n. INTERVENING.] [Lat. intervenire, from inter, between, and venire, to come; It. intervenire, Fr., Pr., & Sp. intervenir, Pg. intervir.]

1. To come or be between persons or things; to be situated between;—followed by between; as, the Mediterranean intervenes between Europe and Africa.
2. To occur, fall, or come between points of time or events; as, the period that intervened between the treaty of Ryswick and the treaty of Utrecht.
3. To happen in a way to disturb, cross, or interrupt; as, events may intervene to frustrate our purposes or wishes.
4. To interpose or undertake an action voluntarily for another; as, a third party may intervene, and accept a bill of exchange for another.