/ Dictionary / Index R rehydrate: Meaning and Definition of Find definitions for: re•hy•drate Pronunciation: (rē-hī'drāt), [key] — -drat•ed, -drat•ing. to restore moisture or fluid to (something dehydrated). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Rehovot Reich 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