viburnum Syllabification: (vi·bur·num)Pronunciation: /vīˈbərnəm/Definition of viburnum noun a shrub or small tree of temperate and warm regions, typically bearing flat or rounded clusters of small white flowers. Genus Viburnum, family Caprifoliaceae: many species and ornamental hybrids, including the guelder rose and wayfaring tree Origin:modern Latin, from Latin, 'wayfaring tree'viburnum in other Oxford dictionaries Definition of viburnum in the British & World English dictionary