/ Dictionary / Index G Grand River: Meaning and Definition of Find definitions for: Grand' Riv'er Pronunciation: [key] former name of the Colorado River above its junction with the Green River in SE Utah. a river in SW Michigan, flowing W to Lake Michigan. 260 mi. (420 km) long. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. grand right and left grand rounds Related Content Daily Word Quiz: crutiny Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language