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 ]
n. an inclination to excessive indulgence in sexual activity; habitually developing a strong sexual arousal. Syn. -- lust, lustfulness, itch. [ WordNet 1.5 ]