sib

1 of 2

adjective

ˈsib 

: related by blood : akin

sib

2 of 2

noun

1

a

: kindred, relatives

b

: a blood relation : kinsman

2

: a brother or sister considered irrespective of sex

broadly : any plant or animal of a group sharing a degree of genetic relationship corresponding to that of human sibs

3

: a group of persons unilaterally descended from a real or supposed ancestor

Examples of sib in a Sentence

Recent Examples on the Web

Noun

There were always at least three trips a week to the Pleasantville Public Library, where my mother and sibs stocked up on new reading material. —Inga, San Diego Union-Tribune, 19 May 2025

So, this is an appreciation post for the best sibs in the biz. —Skyler Caruso, Peoplemag, 5 Apr. 2024

Even a nominal contribution is a show of good faith, much more so than resigning yourself to helplessness beyond telling your sib what to do. —Carolyn Hax, Washington Post, 19 Sep. 2023

Despite their parent's separation, the Cyrus sibs are tight knit. —Addison Aloian, Women's Health, 21 Aug. 2023

Word History

Etymology

Adjective

Middle English, from Old English sibb, from sibb kinship; akin to Old High German sippa kinship, family, Latin sodalis comrade, Greek ēthos custom, character, Latin suus one's own — more at suicide

First Known Use

Adjective

before the 12th century, in the meaning defined above

Noun

before the 12th century, in the meaning defined at sense 1a

Rhymes for sib

• bib
• bibb
• crib
• gib
• glib
• jib
• lib
• mib
• nib
• rib
• squib
• imatinib

Medical Definition

sib

noun

ˈsib 

: a brother or sister considered irrespective of sex

broadly : any plant or animal of a group sharing a degree of genetic relationship corresponding to that of human sibs