A design formed to commit a crime or to do some other thing before it is done. 2. Premeditation differs essentially from will, which constitutes the crime, because it supposes besides an actual will, a deliberation and a continued persistence which indicate more perversity. The preparation of arms or other instruments required for the execution of the crime, are indications of a premeditation, but are not absolute proof of it, as these preparations may have been intended for other purposes, and then suddenly changed to the performance of the criminal act. Murder by poisoning must of necessity be done with premeditation. See Aforethought; Murder. The act of meditating In advance; deliberation upon a contemplated act; plotting or contriving; a design formed to do something before it is done.