damsonEnglishOxford New American Dictionarydamson /ˈdamzən, , ˈdæmzən , ˈdamsən, ˈdæmsən / ▸ noun 1 a small purple-black fruit similar to the plum: [as modifier] damson jam. ▪ a dark purple color. 2 (also damson tree) the small deciduous tree that bears the damson fruit, probably derived from the bullace. Prunus domestica subsp. insititia (or P. damascena), family Rosaceae. – ORIGIN late Middle English damascene, from Latin damascenum (prunum) ‘(plum) of Damascus’. Compare with Damascene and damask.