What is the meaning of Extremus?

superlative degree of exter

1. farthest, outermost, extreme
2. coming at the end, last, final, ultimate
3. extreme in degree, intense
4. pertaining to the end, edge or tip:

   1. farthest, outermost, extreme

      coming at the end, last, final, ultimate

      extreme in degree, intense

      pertaining to the end, edge or tip:

      1. rear

         end

         Source: wiktionary.org