The Collaborative International Dictionary of English v.0.48:

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.
      [1913 Webster]

            A wit that no licentious pertness knows. --Savage.
      [1913 Webster]

   2. Unrestrained by law or morality; lawless; immoral;
      dissolute; lewd; lascivious; as, a licentious man; a
      licentious life. "Licentious wickedness." --Shak.
      [1913 Webster]

   Syn: Unrestrained; uncurbed; uncontrolled; unruly; riotous;
        ungovernable; wanton; profligate; dissolute; lax; loose;
        sensual; impure; unchaste; lascivious; immoral.
        [1913 Webster] -- Li*cen"tious*ly, adv. --
        Li*cen"tious*ness, n.
        [1913 Webster]

WordNet (r) 3.0 (2006):

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