I acknowledge the existance of other definitions of murder, but when I use the term, I mean a totally unjustifiable murder. I don't care if its legal or not. If its justified, its not murder. If its war, the soldiers aren't committing murder since they are being ordered to do it, but the government could be depending on the war (Usually not though.) If a killing is partially justified, its probably something else, such as manslaughter or criminally negligent homicide, not murder outright.
Now I acknowledge that an alternate definition of murder goes strictly by the law. By that standard, abortion can't be murder unless its illegal (I've talked to Civ_King and he actually uses that definition there too, he says abortion is "Slaughter of the unborn" but not actually murder.) And yet another alternate definition of murder applies any and all killing, regardless of reason, "Murder." (That's when "Justifiable murder" is often used and I don't like that definition.) Some people say any individual killing is murder, but don't apply it to the state (Too inconstant for my tastes.) One can even say a killing has to be both illegal AND unjustifiable to be murder. There's a lot of possible definitions out there. Unless I say otherwise, I'm using the one I first described.