- the region of the world that lies in the Northern Hemisphere of the Atlantic Ocean, including all the coastal countries, islands, and archipelagos located there: As a biologist based in Newfoundland, she has a particular interest in the flora and fauna of the North Atlantic.
- of or relating to the region of the world that lies in the Northern Hemisphere of the Atlantic Ocean, often specifically to the North Atlantic Ocean itself: The most active time for North Atlantic hurricane development seems to be from mid-August to mid-October.
