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Found one definition

1.                 From Japanese-English FreeDict Dictionary ver. 0.1:
                   
   
   
                   
                     
    [news2]  [nf27]  [spec2]  宵 /(en)tʃˈaɪniːz(ja)lˈe̞tə/,  [news2]  [nf27]  [spec2] よい /jˈo̞i/
   (adverbial noun (fukushitekimeishi))
    (noun (temporal) (jisoumeishi))
   evening, early night hours