[ dahy-per, dahy-uh-per ]
/ ˈdaɪ pər, ˈdaɪ ə pər /


a piece of cloth or other absorbent material folded and worn as underpants by a baby not yet toilet-trained.
Also called diaper cloth. a linen or cotton fabric with a woven pattern of small, constantly repeated figures, as diamonds.
Also called diaper pattern. such a pattern, originally used in the Middle Ages in weaving silk and gold.

verb (used with object)

to put a diaper on.
to ornament with a diaperlike pattern.

Origin of diaper

1300–50; Middle English diapre < Anglo-French dia(s)p(r)e < Medieval Latin diasprus made of diaper < Medieval Greek díaspros pure white, equivalent to Greek di- di-3 + Medieval Greek áspros white

Related forms

un·dia·pered, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for diaper

British Dictionary definitions for diaper


/ (ˈdaɪəpə) /


US and Canadian a piece of soft material, esp towelling or a disposable material, wrapped around a baby in order to absorb its excrementAlso called (in Britain and certain other countries): nappy
  1. a woven pattern on fabric consisting of a small repeating design, esp diamonds
  2. fabric having such a pattern
  3. such a pattern, used as decoration


(tr) to decorate with such a pattern

Word Origin for diaper

C14: from Old French diaspre, from Medieval Latin diasprus made of diaper, from Medieval Greek diaspros pure white, from dia- + aspros white, shining
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012