/ Dictionary / Index A American bison: Meaning and Definition of Find definitions for: Amer'ican bi'son Pronunciation: [key] bison (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. American Bible Society American bittern Related Content Daily Word Quiz: supine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language