/ Dictionary / Index L line integral: Meaning and Definition of Find definitions for: line' in"tegral Pronunciation: [key] — Math. Math. the limit, as the norm of the partition of a given curve approaches zero, of the sum of the product of the length of the arcs in the partition times the value of the function at some point on each arc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. line-hauler line item Related Content Daily Word Quiz: knead Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language