[ kwo-druhp-lit, -droo-plit, kwod-roo-plit ]
/ kwɒˈdrʌp lɪt, -ˈdru plɪt, ˈkwɒd rʊ plɪt /


any group or combination of four.
quadruplets, four children or offspring born of one pregnancy.
one of four such children or offspring.
Music. a group of four notes of equal value performed in the time normally taken for three.

Nearby words

  1. quadrumvirate,
  2. quadruped,
  3. quadruple,
  4. quadruple run,
  5. quadruple time,
  6. quadruplex,
  7. quadruplicate,
  8. quadruplication,
  9. quadruplicity,
  10. quadrupole

Origin of quadruplet

1780–90; quadruple + -et (modeled on triplet)

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for quadruplet

  • But if, quite satisfied with your service, I propose to you five quadruplet instead of four, you would accept it without doubt.

British Dictionary definitions for quadruplet


/ (ˈkwɒdrʊplɪt, kwɒˈdruːplɪt) /


one of four offspring born at one birthOften shortened to: quad
a group or set of four similar things
music a group of four notes to be played in a time value of three
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

Word Origin and History for quadruplet



"one of four children at a single birth," 1787; from quadruple (adj.) with ending from triplet. Related: Quadruplets. Musical sense is from 1873.

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for quadruplet


[ kwŏ-drōōplĭt, -drŭplĭt, kwŏdrə-plĭt ]


One of four offspring born in a single birth.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.