DuckCorp Dico

Found one definition

1.                 From Japanese-English FreeDict Dictionary ver. 0.1:
                   
   
   
                   
                     
    [ichi1]  [news1]  [nf16]  沖 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, 澳 /(en)tʃˈaɪniːz(ja)lˈe̞tə/,  [ichi1]  [news1]  [nf16] おき /ˈo̞ki/
   (noun (common) (futsuumeishi))
   open sea