/ Dictionary / Index R regd.: Meaning and Definition of Find definitions for: regd. Pronunciation: [key] registered. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. regatta regelate Related Content Daily Word Quiz: overture Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language