/ Dictionary / Index B Bilbao: Meaning and Definition of Find definitions for: Bil•ba•o Pronunciation: (bil-bou' Sp. bēl-bä'ô), [key] — n. a seaport in N Spain, near the Bay of Biscay. 450,000. a mirror of the late 18th century, originally imported from Spain, having a frame partly or wholly of marble and a gilt openwork cresting. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bilayer bilberry Related Content Daily Word Quiz: dentifrice Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language