Source : Webster's Revised Unabridged Dictionary (1913)

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
   commerce with women.

Lecher \Lech"er\, v. i. [imp. & p. p. {Lechered}; p. pr. & vb.
   n. {Lechering}.]
   To practice lewdness.

Source : WordNet®

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