ultranationalismEnglishOxford Dictionary of Englishultranationalism /ʌltrəˈnaʃ(ə)n(ə)lɪz(ə)m / ▸ noun [mass noun] extreme nationalism that promotes the interests of one state or people above all others: they are fanning the flames of ultranationalism. – DERIVATIVES ultranationalist noun & adjective ultranationalistic adjective