What is Banner?

Banner definition and meaning on Dictionary terms:

the flag of a country, army, troop, etc.
an ensign or the like bearing some device, motto, or slogan, as one carried in religious processions, political demonstrations, etc.
a flag formerly used as the standard of a sovereign, lord, or knight.
a sign painted on cloth and hung over a street, entrance, etc.: Banners at the intersection announced the tennis tournament.
anything regarded or displayed as a symbol of principles.
Heraldry. a square flag bearing heraldic devices.
Also called banner line, line, screamer, streamer. Journalism. a headline extending across the width of a newspaper page, usually across the top of the front page.
an open streamer with lettering, towed behind an airplane in flight, for advertising purposes.
Also called banner ad. an advertisement that appears across the top or bottom or along one side of a web page.