First Known Use: before 12th century
Dictionary
1sib
adjective \ˈsib\
Definition of SIB
: related by blood : akin
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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
2sib
noun
Definition of SIB
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
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
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