The definition of murder is an illegal death, but it is also used colloquially to describe an immoral death, so I'll assume we're using the word in that context.
The interesting thing about Good and Evil, is that the definition stems from your own conscience. Your conscience guides you as to whether the things you are doing are right or are wrong. But your morality is an internal construct - the history of the Christian church (and other religions) is a history of the war between a dogmatic, external, conscience and a personal, internal, conscience.
The main difference between a theological conscience and a personal conscience is that the theological conscience does not take any notice of context. For example, the 10 Commandments are VERY black and white as to what is right and what is wrong. Personal morality, however, is very much alive to the concept of context excusing immoral actions.
A classic example would be the Solider example I gave. The bible says THOU SHALT NOT KILL. It doesn't say THOU SHALT NOT KILL, UNLESS IN SELF DEFENCE OR AS PART OF A STATE MANDATED ARMY ENGAGED IN COMBAT OPERATIONS OR UNLESS THE DEATH IS AN ACCIDENT. Of course, there is now some debate as to whether the actual line is THOU SHALT NOT MURDER, but to say that without defining what is or isn't murder makes it a suggestion rather than a commandment, and all the other commandments are quite clear. Murder is a subjective term requiring moral interpretation, none of the other commandments allow creative interpretation.
Let's leave the specific question of "Thou shalt not kill" for now, though, and return to this idea that conscience is the arbiter of right and wrong, and that conscience relies on context. A classic example was the part of the post above, where the idea was posited that I had sidetracked the discussion onto another topic by discussing the rights and wrongs of a soldier killing. SSquared suggested that, whilst interesting in its own right, we should return to considering a plain Murder or a plain old Theft rather than these moralistically difficult questions of a starving man stealing to feed his family or a soldier killing on the battlefield. But this itself makes my point - theft is either right or it is wrong, it cannot be right under some circumstances and wrong under others. If Right or Wrong are universal concepts, then they have to be GLOBALLY universal - and that means that there is no room for contextual interpretation. Contextual interpretation is an earthly device, and is only useful for determining whether earthly punishment is deserved, not for whether an Evil Act has been comitted.
If you're a Christian, then you believe that there is an external arbiter, one who can interpret context globally and universally. The only problem is that this interpreter DOESN'T CARE whether evil acts are comitted or not. Let's take your starving beggar versus embezzling CEO example. Earthly judgement would say that the CEO is worse than the beggar because the CEO stole out of greed whilst the beggar stole out of need. Of course Divine justice DOESN'T CARE whether need or greed was the impulse. Both have stolen, have comitted an immoral act and are stained by it. Grovelling that you had to feed your family won't ameliorate your punishment one iota - it's eternal damnation for you.
HOWEVER if either or both of the wrongdoers admitted their guilt, admitted their personal worthlessness, but remembered that Jesus had died for their sins and thus acquitted them, both would be suitable candidates for heaven. Bizarely, from our point of view, if the CEO admitted he stole from greed and was unworthy, save for Christs intervention, but the beggar replied that there was nothing else he could do, and that God was at fault for creating a world where people could starve to death through no fault of their own, the CEO would be elevated and the Beggar damned for eternity.
Given the truth of those statements, you should conclude that the idea of a globally universal code of ethics is incorrect. The only arbiter that you are willing to accept doesn't even CARE about contextual interpretation, or even about the concepts of right and wrong, it all comes down to how you answer a single question when you get to the "judgement". In which case it is clear that Right and Wrong are as much an internal definition for Christians as they are for anyone else. You guys might derive your code of ethics from what you consider to be a deific source, but your imposition of them on yourselves and ultimately on other people stems from an earthly desire to do so, and not from a divine mandate.
Eon