canna Syllabification: (can·na)Pronunciation: /ˈkanə/ (also canna lily)Definition of canna noun a lilylike, tropical American plant with bright flowers and ornamental straplike leaves. Genus Canna, family Cannaceae: several species, in particular forms of Indian shot (C. indica), which are widely naturalized Origin:from modern Latin, from Latin canna 'cane, reed' (see cane)canna in other Oxford dictionaries Definition of canna in the British & World English dictionary