Is kiLling onE's self a murder or suicide?

I'd imagine that to kill one's self would be suicide. Even if one were speaking philisophically, the death of one's conciousness or physical being by that same person would fit the definition of "suicide" and not "murder," which is to kill another living thing. Unless the person in question is somehow separate from their physical body or conciousness (and I don't see how that's possible), it would be suicide in any way.