island

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A landmass, especially one smaller than a continent, entirely surrounded by water.
• noun Something resembling an island, especially in being isolated or surrounded, as.
• noun An unattached kitchen counter providing easy access from all sides.
• noun A raised curbed area, often used to delineate rows of parking spaces or lanes of traffic.
• noun The superstructure of a ship, especially an aircraft carrier.
• noun Anatomy A cluster of cells differing in structure or function from the cells constituting the surrounding tissue.
• transitive verb To make into or as if into an island; insulate.

from The Century Dictionary.

• See Iceland, Iceland dog.
• To cause to become or appear like an island; insulate.
• To dot as with islands.
• noun A tract of land surrounded by water, whether of the sea, a river, or a lake: in contradistinction to mainland or continent.
• noun Something resembling an island: as, an island of floating ice.
• noun A hill rising out of low ground or swampy land, a small clump of woodland in a prairie, or the like.
• noun A meringue of white of egg and sugar floating in divisions upon soft custard.
• noun In anatomy, any circumscribed portion of tissue or aggregation of cells differing in structure from the surrounding parts.
• Isolated; separate.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb To cause to become or to resemble an island; to make an island or islands of; to isle.
• transitive verb To furnish with an island or with islands.
• noun A tract of land surrounded by water, and smaller than a continent. Cf. Continent.
• noun Anything regarded as resembling an island.
• noun (Zoöl.) See Isle, n., 2.
• noun (Myth.) islands supposed to lie in the Western Ocean, where the favorites of the gods are conveyed at death, and dwell in everlasting joy.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A contiguous area of land, smaller than a continent, totally surrounded by water.
• noun An entity surrounded by other entities that are very different from itself.
• noun A superstructure on an aircraft carrier's deck
• noun UK A traffic island.
• verb transitive To surround with water; make into an island
• verb transitive To set, dot (as if) with islands
• verb transitive To isolate

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a zone or area resembling an island
• noun a land mass (smaller than a continent) that is surrounded by water