metropolitan region of NW France, occupying a peninsula between the English Channel & the Bay of Biscay: 10,505 sq mi (27,208 sq km); pop. 2,796,000; chief city, Rennes
See Brittany in American Heritage Dictionary 4
A historical region and former province of northwest France on a peninsula between the English Channel and the Bay of Biscay. It was settled c. 500 by Britons driven out of their homeland by the Anglo-Saxons. The region was formally incorporated into France in 1532.