Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun sib

2 senses of sib

Sense 1
sibling, sib -- (a person's brother or sister)
       => relative, relation -- (a person related by blood or marriage; "police are searching for relatives of the deceased"; "he has distant relations back in New Jersey")

Sense 2
blood relation, blood relative, cognate, sib -- (one related by blood or origin; especially on sharing an ancestor with another)
       => relative, relation -- (a person related by blood or marriage; "police are searching for relatives of the deceased"; "he has distant relations back in New Jersey")