(1):

(n.) The offense of killing a human being with malice prepense or aforethought, express or implied; intentional and unlawful homicide.

(2):

(n.) To kill with premediated malice; to kill (a human being) willfully, deliberately, and unlawfully. See Murder, n.

(3):

(n.) To destroy; to put an end to.

(4):

(n.) To mutilate, spoil, or deform, as if with malice or cruelty; to mangle; as, to murder the king's English.