noun

• (by extension, in place names) A contiguous area of land, smaller than a continent, partially surrounded by water; a peninsula; a half-island.
  "Despite its name, Barry Island is actually a peninsula"
• (by extension, West Midlands) A roundabout; a traffic circle.
  "Dunton island, near Birmingham, is one of the most confusingly labelled islands in the U.K."
• (government) An unincorporated area wholly surrounded by one or more incorporated areas.
• (grammar) A phrase from which a wh-word cannot be extracted without yielding invalid grammar.
  "Adverbial subordinate clauses are islands for extraction: "They have a billion dollars of inventory that they don't know where *(it) is"."

verb

• (transitive) To surround with water; make into an island.
  "We paused at little river cities along the way and walked upon their bushy dikes, and heard tales of overflows in flood seasons, when four feet or more of water islanded the houses."
• (transitive) To set, dot (as if) with islands.
  "God dwells in light! Before the ocean of unmeasured space, was islanded with stars serenely bright, reflecting back the radiance of his face - he dwelt above in heaven’s immortal bliss, thinking into existence that which is."
• (transitive) To isolate.
  "The turkey's nest was islanded with a fragrant swath,—the "heft" of the crop noted and rejoiced over,—the tons of good timothy and clover calculated,— […]"

name

• (New York City) Long Island (in New York State).
  "Candy came from out on the Island / In the backroom, she was everybody's darling"
• (British Columbia) Vancouver Island.
  "A grizzly was photographed at Rugged Point near Kyuquot on the northwest coast of the Island in May, close to the time bears emerge from their dens, suggesting it had successfully hibernated on the Island."
• (Canada, colloquial) Synonym of Prince Edward Island.
• (Internet slang) Epstein Island.