Catonian UK /kəˈtəʊ.ni.ən/US /kəˈtoʊ.ni.ən/adjective 2noun 1forms 3 adjective2 •Of, pertaining to, dating back to, or resembling Cato the Elder •severe and inflexible. noun1 •A soldier or supporter of Cato the Elder formsCatonians · more Catonian · most Catonian