/ Dictionary / Index B Buchanan: Meaning and Definition of Find definitions for: Bu•chan•an Pronunciation: (by-kan'un, bu-), [key] — n. 1791–1868, 15th president of the U.S. 1857–61. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: buchanan (Thesaurus) Buchan Bucharest Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language