Pronunciation: (mul'ber"ē, -bu-rē),[key] —n., —pl.-ries. 1. the edible, berrylike collective fruit of any tree of the genus Morus. 2. a tree of this genus, as M. rubra(red mulberry or American mulberry) bearing dark-purple fruit, M. nigra(black mulberry) bearing dark-colored fruit, or M. alba(white mulberry) bearing nearly white fruit and having leaves used as food for silkworms. Cf. mulberry family.