Definitions from Black's Law Dictionary: 2nd Edition and Ballentine's Law Dictionary as are available for each term in each dictionary.
  • Ballentine's Law Dictionary

    A proceeding whereby one not originally a party appears in a suit on his own application and joins one of the original parties in his cause of action or defense, or asserts some cause of action in his own favor against one or all of the original parties. See 123 Am. St. Rep. 280, note.

  • Black's Law Dictionary: 2nd Edition

    In international law. Intervention is such an interference between two or more states as may (according to the event) result in a resort to force; while mediation always is, and is intended to be and to centinue, peaceful only. ' Intervention between a sovereign and his own subjects is not justified by anything in international law; but a remonstrance may be addressed to the sovereign in a proper case. Brown. In English ecclesiastical law. The proceeding of a third person, who, not being originally a party to the suit or proceeding, but claiming an interest in the subject-matter in dispute, in order the better to protect such interest, interposes his claim. 2 Chit. Pr. 492; 3 Chit. Commer. Law, 633 ; 2 Hagg. Const. 137; 3 Phillim. Ecc. Law, 586. In the civil law. The act by which a third party demands to be received as a party in a suit pending between other persons. The intervention is made either for the purpose of being joined to the plaintiff, and to claim the same thing he does, or some other thing connected with it; or to join the defendant, and with him to oppose the claim of the plaintiff, which it is his interest to defeat. Poth. Proc. Civile, pt. 1, e. 2, ยง 7, no. 3. In practice. A proceeding in a suit or action by which a third person is permitted by the court to make himself a party, either joining the plaintiff in claiming what is sought by the complaint, or uniting with the defendant in resisting the claims of the plaintiff, or demanding something adversely to both of them. Logan v. Greenlaw (C. C.) 12 Fed. 16; Fischer v. Hanna, 8 Colo. App. 471, 47 Pac. 308; Gale v. Frazier, 4 Dak. 196, 30 N. W. 138; Reay v. Butler (Cal.) 7 Pac. 671.