JOINDER

joinder. Joinder, n. a joining, conjunction, union

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Join″der (?), n. [[F. joindre. See Join, v. t.]] 1. 1. The act of joining; a putting together; conjunction.
Confirmed by mutual joinder of your hands. Shak. 2. 2. (Law) (a) A joining of parties as plaintiffs or defendants in a suit. (b) Acceptance of an issue tendered in law or fact. (c) A joining of causes of action or defense in civil suits or criminal prosecutions.