DuckCorp Dico

Found one definition

1.                 From Japanese-German FreeDict Dictionary ver. 0.2.0:
                   
   
   
                   
                     
    [ichi1]  主 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, 重 /(en)tʃˈaɪniːz(ja)lˈe̞tə/,  [ichi1] おも /ˈo̞mo̞/
   (adjectival nouns or quasi-adjectives (keiyodoshi))
    (noun (common) (futsuumeishi))
   主な, 主に(1) Haupt…, hauptsächlich, (2) erster (m) Kyōgen-Spieler