The Collaborative International Dictionary of English v.0.48:

Dissolute \Dis"so*lute\, a. [L. dissolutus, p. p. of dissolvere:
   cf. F. dissolu. See Dissolve.]
   1. With nerves unstrung; weak. [Obs.] --Spenser.
      [1913 Webster]

   2. Loosed from restraint; esp., loose in morals and conduct;
      recklessly abandoned to sensual pleasures; profligate;
      wanton; lewd; debauched. "A wild and dissolute soldier."
      --Motley.

   Syn: Uncurbed; unbridled; disorderly; unrestrained; reckless;
        wild; wanton; vicious; lax; licentious; lewd; rakish;
        debauched; profligate.
        [1913 Webster]

WordNet (r) 3.0 (2006):

dissolute
    adj 1: unrestrained by convention or morality; "Congreve draws a
           debauched aristocratic society"; "deplorably dissipated
           and degraded"; "riotous living"; "fast women" [syn:
           debauched, degenerate, degraded, dissipated,
           dissolute, libertine, profligate, riotous,
           fast]

Moby Thesaurus II by Grady Ward, 1.0:

53 Moby Thesaurus words for "dissolute":
   abandoned, amoral, contaminated, corrupt, corrupted, debased,
   debauched, decadent, degenerate, degraded, depraved, dissipated,
   fast, free, free-living, gallant, gay, hedonistic, high-living,
   immoral, incontinent, intemperate, lax, libidinous, licentious,
   light, loose, morally polluted, overindulgent, perverted, polluted,
   profligate, raffish, rakehell, rakehellish, rakehelly, rakish,
   reprobate, riotous, rotten, self-indulgent, slack,
   steeped in iniquity, tainted, unbridled, unprincipled,
   unrestrained, vice-corrupted, vitiated, wanton, warped, wayward,
   wild