militarist UK /ˈmɪl.ɪ.tə.ɹɪst/US /ˈmɪl.ə.tə.ɹɪst/noun 2adjective 1forms 1 noun2 •One who advocates military force to an ardent degree and (usually also) advocates the militarization of society.It is widely agreed that rule by intransigent militarists led the Empire of Japan to ruin. •One who believes in the use of military force (at all). adjective1 •Synonym of militaristic. formsmilitarists