The Collaborative International Dictionary of English v.0.48:

Disaffection \Dis`af*fec"tion\, n.
   1. State of being disaffected; alienation or want of
      affection or good will, esp. toward those in authority;
      unfriendliness; dislike.
      [1913 Webster]

            In the making laws, princes must have regard to . .
            . the affections and disaffections of the people.
                                                  --Jer. Taylor.
      [1913 Webster]

   2. Disorder; bad constitution. [R.] --Wiseman.

   Syn: Dislike; disgust; discontent; unfriendliness;
        alienation; disloyalty; hostility.
        [1913 Webster]

WordNet (r) 3.0 (2006):

disaffection
    n 1: the feeling of being alienated from other people [syn:
         alienation, disaffection, estrangement]
    2: disloyalty to the government or to established authority;
       "the widespread disaffection of the troops"