shallow freshwater lake in N & central Netherlands: formerly part of the Zuider Zee, until cut off by a dam (1932)
also sp. Ijs′sel·meer· or Ij′sel·meer·
A shallow, artificial lake of northwest Netherlands. It was formed from the Zuider Zee by the construction of a large dike (completed 1932). Much fertile farmland has been reclaimed from the lake since that time.