Nixonian UK /nɪkˈsəʊ.ni.ən/US /nɪkˈsoʊ.ni.ən/adjective 1noun 1forms 3 adjective1 •Of or relating to Richard Nixon, president of the United States from 1969 to 1974."Nixonian" is a phrase in government that is almost never intended as a compliment. — 2025 noun1 •A supporter of Richard Nixon, president of the United States from 1969 to 1974. formsNixonians · more Nixonian · most Nixonian