adj. 25B6; combining form an ultra-conservative view : EXTREMELY, exceedingly, excessively, immensely, especially, exceptionally; N. English right; informal mega, mucho, majorly, oh-so; Brit. informal dead, ever so, well; N. Amer. informal real; informal, dated devilish; archaic exceeding.
25B6; noun ultras in the animal rights movement : EXTREMIST, radical, fanatic, zealot, diehard, militant.