Source : Webster's Revised Unabridged Dictionary (1913)

Dusky \Dusk"y\, a.
   1. Partially dark or obscure; not luminous; dusk; as, a dusky
      valley.

            Through dusky lane and wrangling mart. --Keble.

   2. Tending to blackness in color; partially black;
      dark-colored; not bright; as, a dusky brown. --Bacon.

            When Jove in dusky clouds involves the sky.
                                                  --Dryden.

            The figure of that first ancestor invested by family
            tradition with a dim and dusky grandeur.
                                                  --Hawthorne.

   3. Gloomy; sad; melancholy.

            This dusky scene of horror, this melancholy
            prospect.                             --Bentley.

   4. Intellectually clouded.

            Though dusky wits dare scorn astrology. --Sir P.
                                                  Sidney.

Source : WordNet®

dusky
     adj 1: lighted by or as if by twilight; "The dusky night rides down
            the sky/And ushers in the morn"-Henry Fielding; "the
            twilight glow of the sky"; "a boat on a twilit river"
            [syn: {twilight(a)}, {twilit}]
     2: naturally having skin of a dark color; "a dark-skinned
        beauty"; "gold earrings gleamed against her dusky cheeks";
        "a smile on his swarthy face"; "`swart' is archaic" [syn:
        {dark-skinned}, {swart}, {swarthy}]
     [also: {duskiest}, {duskier}]