from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an Asian peninsula (off Manchuria) separating the Yellow Sea and the Sea of Japan; the Korean name is Dae-Han-Min-Gook or Han-Gook
Sorry, no etymologies found.
And south korea concluded happened to the "cheonan" which was ripped in two last march off the west coast of the korean peninsula.