Home › Words › S › siblinghoodsiblinghoodsiblinghood · noun — the state of being a sibling.Definition from Wiktionary (CC BY-SA 3.0).Among words judged in Lexicurio's Arena, siblinghood ranks #2,501 of 43,042 for Qualifying.EtymologyFrom sibling + -hood. Compare brotherhood, sisterhood, etc.nounThe state of being a sibling.Definitions & examples from Wiktionary (CC BY-SA 3.0).