/ Dictionary / Index L leading coefficient: Meaning and Definition of Find definitions for: lead'ing coeffi'cient Pronunciation: (lē'ding), [key] — Math. Math. the coefficient of the term of highest degree in a given polynomial. 5 is the leading coefficient in 5x + 3x − 2x + 1. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. leading block leading edge Related Content Daily Word Quiz: labyrinth Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language