The Collaborative International Dictionary of English v.0.48:

Contentment \Con*tent"ment\ (k[o^]n*t[e^]nt"ment), n. [Cf. F.
   contentement. See Content, v. t.]
   1. The state of being contented or satisfied; content.
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            Contentment without external honor is humility.
                                                  --Grew.
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            Godliness with contentment is great gain. --1 Tim.
                                                  vi. 6.
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   2. The act or process of contenting or satisfying; as, the
      contentment of avarice is impossible.
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   3. Gratification; pleasure; satisfaction. [Obs.]
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            At Paris the prince spent one whole day to give his
            mind some contentment in viewing of a famous city.
                                                  --Sir H.
                                                  Wotton.
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WordNet (r) 3.0 (2006):

contentment
    n 1: happiness with one's situation in life [ant: discontent,
         discontentedness, discontentment]

Easton's 1897 Bible Dictionary:

Contentment
   a state of mind in which one's desires are confined to his lot
   whatever it may be (1 Tim. 6:6; 2 Cor. 9:8). It is opposed to
   envy (James 3:16), avarice (Heb. 13:5), ambition (Prov. 13:10),
   anxiety (Matt. 6:25, 34), and repining (1 Cor. 10:10). It arises
   from the inward disposition, and is the offspring of humility,
   and of an intelligent consideration of the rectitude and
   benignity of divine providence (Ps. 96:1, 2; 145), the greatness
   of the divine promises (2 Pet. 1:4), and our own unworthiness
   (Gen. 32:10); as well as from the view the gospel opens up to us
   of rest and peace hereafter (Rom. 5:2).