/ Dictionary / Index B bar sinister: Meaning and Definition of Find definitions for: bar' sin'ister Pronunciation: [key] (not in technical use) a bend sinister or a baton. the proof, condition, or stigma of illegitimate birth. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Barsac barspoon 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