The Collaborative International Dictionary of English v.0.48:

Roost \Roost\, v. i. [imp. & p. p. Roosted; p. pr. & vb. n.
   Roosting.]
   1. To sit, rest, or sleep, as fowls on a pole, limb of a
      tree, etc.; to perch. --Wordsworth.
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   2. Fig.; To lodge; to rest; to sleep.
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            O, let me where thy roof my soul hath hid,
            O, let me roost and nestle there.     --Herbert.
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