Added 9 October 2026 subgroup /ˈsʌbˌɡɹuːp/ noun Categories: SocietyMind & IdeasUncommon Words noun ! Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about subgroup at Wordnik → Where our words come from → A group within a larger group; a group whose members are some, but not all, of the members of a larger group. A subset H of a group G that is itself a group and has the same binary operation as G. verb To divide or classify into subgroups Origin From sub- + group. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: groupgroupingsubclasssubcategorysubsectorclusteringsubsidiarysubcommitteeclusterbicameralunitsubset Back to today's word