Source : Webster's Revised Unabridged Dictionary (1913)

Intercontinental \In`ter*con`ti*nen"tal\, a.
   Between or among continents; subsisting or carried on between
   continents; as, intercontinental relations or commerce.

Source : WordNet®

intercontinental
     adj : extending or taking place between or among continents;
           "intercontinental exploration"; "intercontinental
           flights" [ant: {continental}]