The answer is:
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Island (n.) — A tract of land surrounded by water, and smaller than a continent. Cf. Continent.
Island (n.) — Anything regarded as resembling an island; as, an island of ice.
Island (n.) — See Isle, n., 2.
Island (v. t.) — To cause to become or to resemble an island; to make an island or islands of; to isle.
Island (v. t.) — To furnish with an island or with islands; as, to island the deep.