In English terminology, yes. The Bible wasn't written in English, and when God dictated it to the authors, He wasn't concerned about legal definitions of words in a language that didn't even exist at that time.
The word actually used in the Sixth Commandment in the original language is translated into the English word "murder" - or the more vague word "kill" in the incredibly imprecise King James translation - but it in fact has a much more complex and nuanced meaning. In other places in the Bible, it is used specifically to refer to "killing that is inherently evil".
You should also consider that laws and legal definition flow from pre-existing moral standards, not the other way around. And God was speaking to establish the moral standards which men then codified into law.