The Collaborative International Dictionary of English v.0.48:

Trait \Trait\, n. [F., fr. L. tractus, fr. trahere to draw. See
   Trace, v., and cf. Tract a region, Trace a strap,
   Tret.]
   [1913 Webster]
   1. A stroke; a touch.
      [1913 Webster]

            By this single trait Homer makes an essential
            difference between the Iliad and Odyssey. --Broome.
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   2. A distinguishing or marked feature; a peculiarity; as, a
      trait of character.
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   Note: Formerly pronounced tr[=a], as in French, and still so
         pronounced to some extent in England.
         [1913 Webster]

WordNet (r) 3.0 (2006):

trait
    n 1: a distinguishing feature of your personal nature