[ sib-ling ]
/ ˈsɪb lɪŋ /


a brother or sister.
Anthropology. a comember of a sib, a unilateral descent group thought to share kinship through a common ancestor.


of or relating to a brother or sister: sibling rivalry.

Nearby words

  1. sibilantly,
  2. sibilate,
  3. sibir,
  4. sibirʾ,
  5. sibiu,
  6. sibling species,
  7. sibship,
  8. sibuyan sea,
  9. sibyl,
  10. sibylla

Origin of sibling

before 1000; late Middle English: relative, Old English; see sib, -ling1

Related formshalf-sib·ling, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for siblings

British Dictionary definitions for siblings


/ (ˈsɪblɪŋ) /


  1. a person's brother or sister
  2. (as modifier)sibling rivalry
any fellow member of a sib

Word Origin for sibling

C19: specialized modern use of Old English sibling relative, from sib; see -ling 1

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 siblings


Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for siblings


[ sĭblĭng ]


One of two or more individuals having one or both parents in common; a brother or sister.

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