noun the military governor of a frontier province in medieval Germany.
noun a German nobleman ranking above a count (corresponding in rank to a British marquess).
Examples
“1973: Among pulverised heads of stone margraves and electors, reconnoitering a likely-looking cabbage patch, all of a sudden Slothrop picks up the scent of an unmistakable no it can’t be yes it is it’s a REEFER! — Thomas Pynchon, Gravity’s Rainbow”