/ Dictionary / Index B Ba. Is.: Meaning and Definition of Find definitions for: Ba. Is. Pronunciation: [key] Bahama Islands. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: bais (Thesaurus) bairn baisa 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