/ Dictionary / Index D diaper: Meaning and Definition of Find definitions for: dia•per Pronunciation: (dī'pur, dī'u-pur), [key] — n. a piece of cloth or other absorbent material folded and worn as underpants by a baby not yet toilet-trained. Also calleda linen or cotton fabric with a woven pattern of small, constantly repeated figures, as diamonds. Also calledsuch a pattern, originally used in the Middle Ages in weaving silk and gold. —v.t. to put a diaper on. to ornament with a diaperlike pattern. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: diaper (Thesaurus) diapedesis diaper rash Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language