/ Dictionary / Index B bidialectal: Meaning and Definition of Find definitions for: bi•di•a•lec•tal Pronunciation: (bī"dī-u-lek'tul), [key] — adj. proficient in or using two dialects of the same language. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bidi bidirectional 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