/ Dictionary / Index L letch: Meaning and Definition of Find definitions for: letch Pronunciation: (lech), [key] — Slang. Slang. —n. a lecherous desire or craving. a lecher. any strong desire or liking. —v.i. to behave like a lecher (often fol. by for or after). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: letch (Thesaurus) Leta letdown Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language