1 noun HORT, TOUR, HIST landdiméin fem2 c m uthe castle and its demesnean caisleán agus an talamh atá leis2 noun as placenamediméin fem2 c m uthe Demesne of DownDiméin an Dúin3 noun literary domaintearmann masc1 c m uwelcome to my demesne!do chéad fáilte go dtí mo neadsa!