warm ocean current flowing from the Gulf of Mexico along the E coast of the U.S., and turning east at the Grand Banks toward Europe: c. 50 mi (80 km) wide
See Gulf Stream in American Heritage Dictionary 4
A warm ocean current of the northern Atlantic Ocean off eastern North America. It originates in the Gulf of Mexico and, as the Florida Current, passes through the Straits of Florida and then flows northward along the southeast coast of the United States. North of Cape Hatteras the Gulf Stream veers northeastward into the Atlantic Ocean, where it splits to form the North Atlantic Drift and the Canary Current.