mulberry |?m?l?ber?| noun (pl. mulberries) 1 (also mulberry tree or bush) a small deciduous tree with broad leaves, native to East Asia and long cultivated elsewhere. [Genus Morus, family Moraceae, in particular the white mulberry (M. alba), originally grown for feeding silkworms, and the black (or common) mulberry (M. nigra), grown for its fruit. See also paper mulberry .] ? the dark red or white loganberrylike fruit of the mulberry tree. 2 a dark red or purple color: [ as modifier ] : a mulberry carpet.