/ Dictionary / Index R Roosevelt Island: Meaning and Definition of Find definitions for: Roo'sevelt Is'land Pronunciation: [key] Formerly,an island in the East River, New York City: residential community. 1 mi. (2 km) long. an island in Antarctica, in the W part of the Ross Ice Shelf: discovered 1934. ab. 90 mi. (145 km) long. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Rooseveltian roost Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language