/ Dictionary / Index L leading block: Meaning and Definition of Find definitions for: lead'ing block' Pronunciation: (lē'ding), [key] — Naut. Naut. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. leading article leading coefficient 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