from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The sea when it is very rough due to strong winds and storms, such that the sea encroaches much further inland than is normal, often causing damage.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the open seas of the world outside the territorial waters of any nation
From Middle English *hei-sea, *heh-se, from Old English hēahsǣ ("the high sea, the deep"), equivalent to high- + sea. (Wiktionary)