RhymeZone: alcatraz definitions

Definitions of Alcatraz:

noun: Ellipsis of Alcatraz Island.. An island in San Francisco Bay, Pacific Ocean, of California, United States, formerly the site of a famous prison
noun: Ellipsis of Alcatraz Federal Penitentiary., a famous former U.S. federal prison, on the island.
noun: Ellipsis of Fort Alcatraz., a U.S. coastal defense fort, predecessor of the prison.

(Definitions from Wiktionary)