1. [adj]  (poetic) occurring in the dark or night; "a darkling journey"
2. [adj]  uncannily or threateningly dark or obscure; "a darkling glance"; "secret operatives and darkling conspiracies"-Archibald MacLeish

Darkling
Leaning on Thomas Hardy`s poem The Darkling Thrush in a manner that is innovative and yet coursing with the undercurrents of ancient form, Rabinowitz meditates on her Polish-Jewish culture and the terrors of the 20th century in a book-length elegy....

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1. \Dark"ling\, adv. [Dark + the adverbial suffix -ling.]
   In the dark. [Poetic]
         So, out went the candle, and we were left darkling.
                                                  --Shak.
         As the wakeful bird Sings darkling.      --Milton.
   

2. \Dark"ling\, p. pr. & a.
   1. Becoming dark or gloomy; frowing.
            His honest brows darkling as he looked towards me.
                                                  --Thackeray.
   2. Dark; gloomy. ``The darkling precipice.'' --Moore.