[ 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.

Origin of sibling

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

Related forms

half-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

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.