An island or isle is any piece of sub-continental land that is surrounded by water. Very small islands such as emergent land features on atolls can be called islets, cays or keys. An island in a river or lake may be called an eyot /ˈaɪ. ət/, or holm.
OmegaWiki Dictionary
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island A land mass, especially one smaller than a continent, entirely surrounded by water.
island A barrier on roads and highways between the opposing flows of traffic, usually covered with vegetation.
island Area in the middle of a road where pedestrians can wait while crossing.
