/ Dictionary / Index B bullion: Meaning and Definition of Find definitions for: bul•lion Pronunciation: (bool'yun), [key] — n. gold or silver considered in mass rather than in value. gold or silver in the form of bars or ingots. Also calleda thick trimming of cord covered with gold or silver thread, for decorating uniforms. embroidery or lace worked with gold wire or gold or silver cords. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: bullion (Thesaurus) bullhorn bullionist Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language