¹sib

adjective \ˈsib\

Definition of SIB

: related by blood : akin

Origin of SIB

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: before 12th century

Rhymes with SIB

bib, crib, drib, fib, gib, glib, Hib, jib, lib, nib, rib, squib

²sib

noun

Definition of SIB

a : kindred, relatives

b : a blood relation : kinsman

: 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

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

First Known Use of SIB

before 12th century

Medical Dictionary

sib

noun \ˈsib\

Medical Definition of SIB

: 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