Breadcrumb Home > Dictionary > Index B bull session: Meaning and Definition of Find definitions for: bull' ses"sion Pronunciation: [key] — Informal. Informal. an informal, spontaneous discussion. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Bull Run bull's-eye ✖ Related Content Daily Word Quiz: tendentious Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language