Cliftonian UK /klɪfˈtəʊ.ni.ən/US /klɪfˈtoʊ.ni.ən/adjective 1noun 1forms 3 adjective1 •Of or relating to Clifton College, an independent school in the suburb of Clifton in Bristol, England, founded in 1862. noun1 •A student or alumnus of Clifton College. formsCliftonians · more Cliftonian · most Cliftonian