Definition of gonfanon:
(n) :
(heraldry) A banner with three "tails", typically with the middle one longer than the others, and three loops at the top representing where it would have been attached to a pole.
(n) :
Alternative form of gonfalon. [A standard or ensign, consisting of a pole with a crosspiece from which a banner is suspended, especially as used in church processions, but also for civic and military display.]