/ Dictionary / Index R Rock Falls: Meaning and Definition of Find definitions for: Rock' Falls' Pronunciation: [key] a city in NW Illinois. 10,624. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. rockfall rock fence Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language