Source : Webster's Revised Unabridged Dictionary (1913)

Coasting \Coast"ing\, a.
   Sailing along or near a coast, or running between ports along
   a coast.

   {Coasting trade}, trade carried on by water between
      neighboring ports of the same country, as distinguished
      from foreign trade or trade involving long voyages.

   {Coasting vessel}, a vessel employed in coasting; a coaster.