/ Dictionary / Index R retardate: Meaning and Definition of Find definitions for: re•tar•date Pronunciation: (ri-tär'dāt), [key] — n. someone who is retarded in some way, as educationally or mentally; retardee. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. retardant retardation Related Content Daily Word Quiz: abominable Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language