NORDSTRAND, nôrd'stränt, Germany, an island belonging to the North Friesian group, in the North Sea; area, about 21 square miles. Prior to 1634 the area was about 210 square miles, but that year a flood swept over the island, destroying the greater part of the land and drowning over 6,000 people. Many people on the islands of the vicinity were drowned. Pop. about 3,000.