from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. An inlet of the Atlantic Ocean between Britain (in the west), Scandinavia (in the east) and Germany, Netherlands, Belgium and France (in the south).
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an arm of the North Atlantic between the British Isles and Scandinavia; oil was discovered under the North Sea in 1970
From Middle English North-see, from Old English norþsǣ ("northern sea, Bristol Channel, Baltic, North Sea"), equivalent to north + sea. Cognate with West Frisian Noardsee ("North Sea"), Dutch Noordzee ("North Sea"), German Nordsee ("North Sea"), Swedish Nordsjön ("North Sea"), Icelandic Norðursjór ("North Sea"). (Wiktionary)