The Collaborative International Dictionary of English v.0.48:

Aversion \A*ver"sion\, n. [L. aversio: cf. F. aversion. See
   Avert.]
   1. A turning away. [Obs.]
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            Adhesion to vice and aversion from goodness. --Bp.
                                                  Atterbury.
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   2. Opposition or repugnance of mind; fixed dislike;
      antipathy; disinclination; reluctance.
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            Mutual aversion of races.             --Prescott.
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            His rapacity had made him an object of general
            aversion.                             --Macaulay.
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   Note: It is now generally followed by to before the object.
         [See Averse.] Sometimes towards and for are found;
         from is obsolete.
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               A freeholder is bred with an aversion to
               subjection.                        --Addison.
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               His aversion towards the house of York. --Bacon.
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               It is not difficult for a man to see that a
               person has conceived an aversion for him.
                                                  --Spectator.
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               The Khasias . . . have an aversion to milk. --J.
                                                  D. Hooker.
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   3. The object of dislike or repugnance.
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            Pain their aversion, pleasure their desire. --Pope.
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   Syn: Antipathy; dislike; repugnance; disgust. See Dislike.
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WordNet (r) 3.0 (2006):

aversion
    n 1: a feeling of intense dislike [syn: antipathy, aversion,
         distaste]
    2: the act of turning yourself (or your gaze) away; "averting
       her gaze meant that she was angry" [syn: aversion,
       averting]