The Collaborative International Dictionary of English v.0.48:

Lecherous \Lech"er*ous\, a.
   Like a lecher; addicted to lewdness; excessively lustful; --
   used mostly of men; also, lust-provoking. "A lecherous thing
   is wine." --Chaucer. -- Lech"er*ous*ly, adv. --
   Lech"er*ous*ness, n.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

lecherousness \lech"er*ous*ness\ n.
   an inclination to excessive indulgence in sexual activity;
   habitually developing a strong sexual arousal.

   Syn: lust, lustfulness, itch.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

lecherousness
    n 1: a strong sexual desire [syn: lecherousness, lust,
         lustfulness]