/ Dictionary / Index B bar line: Meaning and Definition of Find definitions for: bar' line" Pronunciation: [key] — Music. Music. bar (def. 16a). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. barley water barlow Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language