a bay in W California: the harbor of San Francisco; connected with the Pacific by the Golden Gate strait. 50 miles (80 km) long; 3–12 miles (5–19 km) wide.
British Dictionary definitions for San Francisco Bay
San Francisco Bay
noun
1.
an inlet of the Pacific in W California, linked with the open sea by the Golden Gate strait. Length: about 80 km (50 miles). Greatest width: 19 km (12 miles)
San Francisco Bay in Culture
San Francisco Bay definition
Located in northern California; entered from the Pacific Ocean through a strait called the Golden Gate.