The Collaborative International Dictionary of English v.0.48:

Pinion \Pin"ion\, v. t. [imp. & p. p. Pinioned; p. pr. & vb.
   n. Pinioning.]
   1. To bind or confine the wings of; to confine by binding the
      wings. --Bacon.
      [1913 Webster]

   2. To disable by cutting off the pinion joint. --Johnson.
      [1913 Webster]

   3. To disable or restrain, as a person, by binding the arms,
      esp. by binding the arms to the body. --Shak.
      [1913 Webster]

            Her elbows pinioned close upon her hips. --Cowper.
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   4. Hence, generally, to confine; to bind; to tie up.
      "Pinioned up by formal rules of state." --Norris.
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The Collaborative International Dictionary of English v.0.48:

Pinioned \Pin"ioned\, a.
   Having wings or pinions.
   [1913 Webster]

WordNet (r) 3.0 (2006):

pinioned
    adj 1: (of birds) especially having the flight feathers
    2: bound fast especially having the arms restrained