[ sib ]
/ sɪb /
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related by blood; akin.


a kinsman; relative.
one's kin or kindred.
Anthropology. a unilateral descent group.



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Origin of sib

First recorded before 900; Middle English sib(e), sibb(e), Old English sib(b) (originally an adjective); cognate with Old Norse sifjar (plural) “relatives,” Old Frisian sib (adjective), sibba (noun), Middle Dutch sibbe (noun and adjective), German Sippe “kin”; cf. gossip
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for sib

British Dictionary definitions for sib (1 of 2)

/ (sɪb) /


a blood relative
a brother or sister; sibling
kinsmen collectively; kindred
any social unit that is bonded by kinship through one line of descent only

Word Origin for sib

Old English sibb; related to Old Norse sifjar relatives, Old High German sippa kinship, Latin suus one's own; see gossip

British Dictionary definitions for sib (2 of 2)


abbreviation for (in Britain)

(the former) Securities and Investments Board
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

Medical definitions for sib

[ sĭb ]


A blood relation; a relative.
A person's relatives when considered as a group; kinfolk.
A brother or sister; a sibling.


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