prunus Syllabification: (pru·nus)Pronunciation: /ˈpro͞onəs/Definition of prunus noun a tree or shrub of a large genus that includes many varieties grown for their spring blossom (cherry and almond) or for their fruit (plum, peach, and apricot). Genus Prunus, family Rosaceae Origin:modern Latin, from Latin, literally 'plum tree'prunus in other Oxford dictionaries Definition of prunus in the British & World English dictionary