Breadcrumb Home > Dictionary > Index B brontosaurus: Meaning and Definition of Find definitions for: bron•to•sau•rus Pronunciation: (bron"tu-sôr'us), [key] — pl. -sau•rus•es, -sau•ri brontosaur. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: brontosaurus (Thesaurus) brontosaur Bronx TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: frisson Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language