Originally Posted by
Iscah
Where are you getting that definition from? It's not one that's ever been expressed in the game. When it's talked about, it's very much about dealing with or 'calling back' the dead.
More broadly and back in the real world, my dictionary defines necromancy as "the art of predicting by means of communication with the dead", and the prefix necro- is from nekros, a corpse. It is very much centred around death and the dead (or undead).
I've never seen your "any manipulation of life energies" definition used elsewhere, either.