"Murder is the unlawful killing, with malice aforethought, of another human, and generally this state of mind distinguishes murder from other forms of unlawful homicide (such as manslaughter)."
Murder is premeditated. End of. I don't give a sh!t what your shyster lawyers say.
English language does.
Odd that someone in a country with 60 million would declare the rest of the world (e.g., population 310 million here) parochial.