Source : Webster's Revised Unabridged Dictionary (1913)

Broadside \Broad"side`\, n.
   1. (Naut.) The side of a ship above the water line, from the
      bow to the quarter.

   2. A discharge of or from all the guns on one side of a ship,
      at the same time.

   3. A volley of abuse or denunciation. [Colloq.]

   4. (Print.) A sheet of paper containing one large page, or
      printed on one side only; -- called also {broadsheet}.

Source : WordNet®

broadsheet
     n : an advertisement (usually printed on a page or in a leaflet)
         intended for wide distribution; "he mailed the circular
         to all subscribers" [syn: {circular}, {handbill}, {bill},
          {broadside}, {flier}, {flyer}, {throwaway}]