Source : Webster's Revised Unabridged Dictionary (1913)

Atlantic \At*lan"tic\, a. [L. Atlanticus, fr. Atlas. See {Atlas}
   and {Atlantes}.]
   1. Of or pertaining to Mt. Atlas in Libya, and hence applied
      to the ocean which lies between Europe and Africa on the
      east and America on the west; as, the Atlantic Ocean
      (called also the Atlantic); the Atlantic basin; the
      Atlantic telegraph.

   2. Of or pertaining to the isle of Atlantis.

   3. Descended from Atlas.

            The seven Atlantic sisters.           --Milton.

Source : WordNet®

Atlantic
     adj : relating to or bordering the Atlantic Ocean; "Atlantic
           currents"

Atlantic
     n : the 2nd largest ocean; separates North and South America on
         the west from Europe and Africa on the east [syn: {Atlantic
         Ocean}]