what is canna
Definition of CANNA. : any of a genus (Canna of the family Cannaceae) of tropical herbs with simple stems, large leaves, and a terminal raceme of irregular flowers.See canna defined for kids.ADVERTISEMENT. any of a genus (Canna of the family Cannaceae) of tropical herbs with simple stems, large leaves, and a terminal raceme of irregular flowers. See canna defined for kids. ADVERTISEMENT.