/ Dictionary / Index L Lewis and Harris: Meaning and Definition of Find definitions for: Lew'is and Har'ris Pronunciation: [key] the northernmost island of the Hebrides, in NW Scotland. 825 sq. mi. (2135 sq. km). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Lewis acid Lewis base Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language