/ Dictionary / Index L lead-pipe cinch: Meaning and Definition of Find definitions for: lead'-pipe cinch' Pronunciation: (led'pīp"), [key] — Slang. Slang. an absolute certainty: It's a lead-pipe cinch they'll be there. something very easy to accomplish: Getting him elected will be a lead-pipe cinch. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lead pencil leadplant 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