/ Dictionary / Index B briefcase: Meaning and Definition of Find definitions for: brief•case Pronunciation: (brēf'kās"), [key] — n. a flat, rectangular case with a handle, often of leather, for carrying books, papers, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: briefcase (Thesaurus) brief briefing Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language