Dorset2Pronunciation: /ˈdɔːsɪt/Definition of Dorset noun [usually as modifier] Archaeology a prehistoric culture which flourished in the American Arctic during the 1st millennium ad and was displaced by the Thule culture: Dorset sites are bigger than their pre-Dorset counterpartsOrigin: 1930s: from the name of Cape Dorset, Baffin IslandDorset in other Oxford dictionaries Definition of Dorset in the US English dictionary