1. a former inlet of the North Sea in the northern coast of the Netherlands; sealed off from the sea in 1932 by a dam that created the IJsselmeer;
WordNet (r) 3.0 (2006):
Zuider Zee
n 1: a former inlet of the North Sea in the northern coast of
the Netherlands; sealed off from the sea in 1932 by a dam
that created the IJsselmeer