/ Dictionary / Index S Sanibel Island: Meaning and Definition of Find definitions for: San'ibel Is'land Pronunciation: (san'u-bul, -bel"), [key] an island in the Gulf of Mexico off the SW coast of Florida. 16 sq. mi. (41.5 sq. km). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Sanhedrin sanicle Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language