n.1. The side of a ship above the water line.
2. a. All the guns on one side of a warship.
b. The simultaneous discharge of these guns.
3. A forceful verbal attack, as in a speech or editorial.
4. a. A large sheet of paper usually printed on one side.
b. Something, such as an advertisement or public notice, that is printed on a broadside. Also called broadsheet.
5. A broad, unbroken surface.