Honest question. Do you think you've cleared anything up with this definition? I don't think you've gotten anywhere closer to the truth. If only it were so easy to know what the mission is or what is in service of the mission. In life, in software, there are enough derelict projects, aspirations, visions, dreams to fill a graveyard. That should serve as a warning that it's not so clear.
And anyway, does the mission really have to say "We are a 'help the mission'ocracy"?