1) noun. A native born citizen of the Vatican City State, conceived in lawful procreation, born within the Leonine Walls, and baptized in the Church of Sant' Anna. Usually fewer than half a dozen little native Vaticanians are born each year. 2) noun. A cardinal fleeing prosecution in his native country and now living in the Vatican with a view to avoiding extradition, e.g. Cardinal Bernard Law, formerly of Boston.
Did you see the baby Vaticanians being baptized in Sant' Anna? They were baptized by Cardinal Law, formerly of Boston, a true senior Vaticanian.