/ Dictionary / Index B Bioko: Meaning and Definition of Find definitions for: Bi•o•ko Pronunciation: (bē-ō'kō), [key] — n. an island in the Bight of Biafra, near the W coast of Africa: a province of Equatorial Guinea. 80,000; ab. 800 sq. mi. (2072 sq. km). Formerly, Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: bioko (Thesaurus) biokinetics biol. Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language