/ Dictionary / Index L lengthwise: Meaning and Definition of Find definitions for: length•wise Pronunciation: (lengkth'wīz", length'-, lenth'-), [key] — adv., adj. in the direction of the length. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lengthwise (Thesaurus) lengthways lengthy Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language