/ Dictionary / Index R Roche limit: Meaning and Definition of Find definitions for: Roche' lim"it Pronunciation: (rōsh Fr. rôsh), [key] the minimum distance below which a moon orbiting a celestial body would be disrupted by tidal forces or below which a moon would not have formed. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. roche alum Rochelle Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language