The Collaborative International Dictionary of English v.0.48:

Alight \A*light"\, v. i. [imp. & p. p. Alightedsometimes
   Alit; p. pr. & vb. n. Alighting.] [OE. alihten, fr. AS.
   [=a]l[imac]htan; pref. [=a]- (cf. Goth. us-, G. er-, orig.
   meaning out) + l[imac]htan, to alight, orig. to render light,
   to remove a burden from, fr. l[imac]ht, leoht, light. See
   Light, v. i.]
   1. To spring down, get down, or descend, as from on horseback
      or from a carriage; to dismount.
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   2. To descend and settle, lodge, rest, or stop; as, a flying
      bird alights on a tree; snow alights on a roof.
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   3. To come or chance (upon). [R.]
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