The Collaborative International Dictionary of English v.0.48:

Glede \Glede\ (gl[=e]d), n. [AS. glida, akin to Icel. gle[eth]a,
   Sw. glada. Cf. Glide, v. i.] (Zool.)
   The common European kite (Milvus ictinus). This name is
   also sometimes applied to the buzzard. [Written also glead,
   gled, gleed, glade, and glide.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Glade \Glade\, n. [Prob. of Scand. origin, and akin to glad, a.;
   cf. also W. golead, goleuad, a lighting, illumination, fr.
   goleu light, clear, bright, goleu fwlch glade, lit., a light
   or clear defile.]
   [1913 Webster]
   1. An open passage through a wood; a grassy open or cleared
      space in a forest.
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            There interspersed in lawns and opening glades.
                                                  --Pope.
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   2. An everglade. [Local, U. S.]
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   3. An opening in the ice of rivers or lakes, or a place left
      unfrozen; also, smooth ice. [Local, U. S.]
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   Bottom glade. See under Bottom.

   Glade net, in England, a net used for catching woodcock and
      other birds in forest glades.
      [1913 Webster]

WordNet (r) 3.0 (2006):

glade
    n 1: a tract of land with few or no trees in the middle of a
         wooded area [syn: clearing, glade]