Source : Webster's Revised Unabridged Dictionary (1913)

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.

   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.

Source : WordNet®

treed
     adj : forced to turn and face attackers; "a stag at bay"; "she had
           me cornered between the porch and her car"; "like a
           trapped animal" [syn: {at bay(p)}, {cornered}, {trapped}]