A name popularly given to any flag which hangs from a crosspiece or frame instead of from the staff or the mast itself.

a flag, but only if it is suspended from a horizontal bar rather than a vertical mast

The flag of a state or one that hangs from a crossbar.

The ensign or standard in use by certain princes or states, such as the mediæval republics of Italy, and in more recent times by the pope.

banner or standard.