The Collaborative International Dictionary of English v.0.48:

Tree \Tree\, v. t. [imp. & p. p. Treed; p. pr. & vb. n.
   Treeing.]
   1. To drive to a tree; to cause to ascend a tree; as, a dog
      trees a squirrel. --J. Burroughs.
      [1913 Webster]

   2. To place upon a tree; to fit with a tree; to stretch upon
      a tree; as, to tree a boot. See Tree, n., 3.
      [1913 Webster]