/ Dictionary / Index B Boulder Canyon: Meaning and Definition of Find definitions for: Boul'der Can'yon Pronunciation: [key] a canyon of the Colorado River between Arizona and Nevada, above Boulder Dam. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. boulder boulder clay 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