The Collaborative International Dictionary of English v.0.48:

Lech \Lech\ (l[e^]ch), v. t. [F. l['e]cher. See Lick.]
   To lick. [Obs.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

lech \lech\ (l[e^]ch), n. & v. i.
   Same as letch.
   [PJC]

The Collaborative International Dictionary of English v.0.48:

Lecher \Lech"er\, n. [OE. lechur, lechour, OF. lecheor, lecheur,
   gormand, glutton, libertine, parasite, fr. lechier to lick,
   F. l['e]cher; of Teutonic origin. See Lick.]
   A man given to lewdness; one addicted, in an excessive
   degree, to the indulgence of sexual desire, or to illicit
   sexual relations with women; also called letch and lech.
   [1913 Webster]

WordNet (r) 3.0 (2006):

lech
    n 1: man with strong sexual desires [syn: satyr, lecher,
         lech, letch]