The Collaborative International Dictionary of English v.0.48:

Orle \Orle\, n. [F. orle an orle, a fillet, fr. LL. orla border,
   dim. of L. ora border, margin.]
   [1913 Webster]
   1. (Her.) A bearing, in the form of a fillet, round the
      shield, within, but at some distance from, the border.
      [1913 Webster]

   2. (Her.) The wreath, or chaplet, surmounting or encircling
      the helmet of a knight and bearing the crest.
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   In orle, round the escutcheon, leaving the middle of the
      field vacant, or occupied by something else; -- said of
      bearings arranged on the shield in the form of an orle.
      [1913 Webster]