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1. A river, about 300 km (185 mi) long, of southeast Ontario, Canada. It is part of the Trent-Severn Waterway, about 385 km (240 mi) long, which connects Lake Ontario with Georgian Bay.
2. A river, about 275 km (170 mi) long, of central England flowing generally northeast to join the Ouse River and form the Humber estuary.