MURDER, in law, the unlawful killing of a person with malice aforethought (see HOMICIDE). The O. Eng. morSor comes ultimately from the Indo-European root mar-, to die, which has also given Lat. mars, death, and all its derivatives in English, French and other Rom. languages; cf. Gr. |3por6$, for noprbs, mortal. The O. Eng. form, Latinized as murdrum, murtrum, whence Fr. meurtre, is represented in other Teutonic languages by a cognate form, e.g. Ger. Mord, Du. moord.
Note - this article incorporates content from Encyclopaedia Britannica, Eleventh Edition, (1910-1911)