Source : Webster's Revised Unabridged Dictionary (1913)

Licentious \Li*cen"tious\ (-sh[u^]s), a. [L. licentiosus: cf. F.
   licencieux. See {License}.]
   1. Characterized by license; passing due bounds; excessive;
      abusive of freedom; wantonly offensive; as, a licentious
      press.

            A wit that no licentious pertness knows. --Savage.

   2. Unrestrained by law or morality; lawless; immoral;
      dissolute; lewd; lascivious; as, a licentious man; a
      licentious life. ``Licentious wickedness.'' --Shak.

   Syn: Unrestrained; uncurbed; uncontrolled; unruly; riotous;
        ungovernable; wanton; profligate; dissolute; lax; loose;
        sensual; impure; unchaste; lascivious; immoral. --
        {Li*cen"tious*ly}, adv. -- {Li*cen"tious*ness}, n.

Source : WordNet®

licentiousness
     n 1: the quality of being lewd and lascivious [syn: {wantonness}]
     2: dissolute indulgence in sensual pleasure [syn: {profligacy},
         {dissipation}, {dissolution}]