/ Dictionary / Index B beluga: Meaning and Definition of Find definitions for: be•lu•ga Pronunciation: (bu-l'gu), [key] — n. Also calleda white sturgeon, Huso huso, of the Black and Caspian seas, valued as a source of caviar and isinglass. Also calleda cetacean, Delphinapterus leucas, of northern seas, that has a rounded head and is white when adult. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: beluga (Thesaurus) beltway belvedere Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language