arm of the Atlantic, between S England & NW France: 21-150 mi (34-241 km) wide; c. 350 mi (563 km) long
See English Channel in American Heritage Dictionary 4
An arm of the Atlantic Ocean between western France and southern England. It opens into the North Sea and is traversed by a train-ferry service. A rail tunnel beneath the English Channel, known as the “chunnel,” connecting Folkstone, England and Calais, France, was opened in 1994.