Русско-англо-русский юридический словарь

A crime of passion, or crime passionnel (from French), in popular usage, refers to a violent crime, especially homicide, in which the perpetrator commits the act against someone because of sudden strong impulse such as sudden rage rather than as a premeditated crime. (Wikipedia)

What is PREMEDITATED MURDER? The term that is used to describe a murder that was planned in advance and was carried out willfully. (The Law Dictionary)

A premeditated crime is planned or thought about before it is done. (COBUILD Advanced English Dictionary)

"You will observe that, to constitute murder in the first degree, the act causing death must have been perpetrated from premeditated design. Premeditated design to kill means intent to kill. "Design" means intent, and both words essentially imply premeditation or design formed before the act. The premeditation of the statute does not exclude sudden intent, and need not be slow or last long." (Eckman v. State, 191 Wis. 63 (1926))