/ Dictionary / Index L Long Island: Meaning and Definition of Find definitions for: Long" Is'land Pronunciation: [key] an island in SE New York: the boroughs of Brooklyn and Queens of New York City are located at its W end. 118 mi. (190 km) long; 12–20 mi. (19–32 km) wide; 1682 sq. mi. (4356 sq. km). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. longish Long Island Sound Related Content Daily Word Quiz: ounterfeit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language