/ Dictionary / Index R registrate: Meaning and Definition of Find definitions for: reg•is•trate Pronunciation: (rej'u-strāt"), [key] — -trat•ed, -trat•ing. to select and combine pipe organ stops. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. registrar registration Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language