- a seaport in N Spain, near the Bay of Biscay.
- U.S. Furniture. a mirror of the late 18th century, originally imported from Spain, having a frame partly or wholly of marble and a gilt openwork cresting.
- a port in N Spain, on the Bay of Biscay: the largest city in the Basque Provinces: famous since medieval times for the production of iron and steel goods: modern buildings include the Guggenheim Art Museum (1997). Pop: 353 567 (2003 est)Basque name: Bilbo