/ Dictionary / Index R re-up: Meaning and Definition of Find definitions for: re-up Pronunciation: (rē-up'), [key] — -upped, -up•ping. to reenlist. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. reunite re-uptake Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language