a river in SW Poland, rising on the northern Czech border, and flowing northeast to join the Oder near Brzeg. Length: about 193 km (120 miles)
Polish name: Nysa
2. Also called: Lusatian Neisse
a river in E Europe, rising near Liberec in the Czech Republic and flowing north to join the Oder: forms part of the German–Polish border. Length: 225 km (140 miles)