n. 1) the act of voluntarily terminating a criminal prosecution or a lawsuit or one of its causes of action by one of the parties. 2) a judge's ruling that a lawsuit or criminal charge is terminated. 3) an appeals court's act of dismissing an appeal, letting the lower court decision stand. 4) the act of a plaintiff dismissing a lawsuit upon settling the case. Such a dismissal may be dismissal with prejudice, meaning it can never be filed again, or dismissal without prejudice, leaving open the possibility of bringing the suit again if the defendant does not follow through on the terms of the settlement.