Source : Webster's Revised Unabridged Dictionary (1913)

Complacence \Com*pla"cence\, Complacency \Com*pla"cen*cy\, n.
   [LL. complacentia: cf. F. complaisance. See {Complacent}, and
   cf. {Complaisance}.]
   1. Calm contentment; satisfaction; gratification.

            The inward complacence we find in acting reasonably
            and virtuously.                       --Atterbury.

            Others proclaim the infirmities of a great man with
            satisfaction and complacency, if they discover none
            of the like in themselves.            --Addison.

   2. The cause of pleasure or joy. ``O thou, my sole
      complacence.'' --Milton.

   3. The manifestation of contentment or satisfaction; good
      nature; kindness; civility; affability.

            Complacency, and truth, and manly sweetness, Dwell
            ever on his tongue, and smooth his thoughts.
                                                  --Addison.

            With mean complacence ne'er betray your trust.
                                                  --Pope.

Source : WordNet®

complacency
     n : the feeling you have when you are satisfied with yourself;
         "his complacency was absolutely disgusting" [syn: {complacence},
          {self-complacency}, {self-satisfaction}]