one of the most northern provinces of the united Netherlands, bounded by the German ocean on the north, by Groningen and Overijssel on the east, by the Zuider-see and Overijssel on the south, and by the same ocean on the west: its chief town is Leeuwarden.

East Friesland, a province of Westphalia, in Germany, being the north-west part of Germany, bordering on Groningen.