/ Dictionary / Index L Lagoon Islands: Meaning and Definition of Find definitions for: Lagoon' Is'lands Pronunciation: [key] a former name of Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lagoon Lagos 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