Source : Webster's Revised Unabridged Dictionary (1913)

Antinomianism \An`ti*no"mi*an*ism\, n.
   The tenets or practice of Antinomians. --South.

Source : WordNet®

antinomianism
     n : the theological doctrine that by faith and God's grace a
         Christian is freed from all laws (including the moral
         standards of the culture)