(1):
(n.) A title of rank, conferred for heroic deeds, and hence, an order of knighthood; also, the person bearing such title or rank.
(2):
(n.) A civil officer in some Swiss cantons.
(3):
(n.) A small banner.
(4):
(n.) Originally, a knight who led his vassals into the field under his own banner; - commonly used as a title of rank.