/ Dictionary / Index B Bellatrix: Meaning and Definition of Find definitions for: Bel•la•trix Pronunciation: (bu-lā'triks), [key] — n. Astron. a blue-white giant star in the constellation Orion, with apparent magnitude +1.63. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bellarmine Bellay 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