The Collaborative International Dictionary of English v.0.48:

Gloom \Gloom\, v. i. [imp. & p. p. Gloomed; p. pr. & vb. n.
   Glooming.]
   1. To shine or appear obscurely or imperfectly; to glimmer.
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   2. To become dark or dim; to be or appear dismal, gloomy, or
      sad; to come to the evening twilight.
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            The black gibbet glooms beside the way. --Goldsmith.
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            [This weary day] . . . at last I see it gloom.
                                                  --Spenser.
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