cy·clon·ic \(ʸ)sī|klänik, -nēk\adjective alsocy·clon·i·cal\-nə̇kəl, -nēk-\ 1.: of, relating to, or having the characteristics of a cyclone 2.: resembling a cyclone especially in violence and vigor < a man given to cyclonic rages > < a voluble, cyclonic, half-mad painter — Roland Gelatt >