The Collaborative International Dictionary of English v.0.48:

Isle \Isle\, n. [Obs.]
   See Aisle.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Isle \Isle\, n. [OF. isle, F. [^i]le, L. insula; cf. Lith. sala.
   Cf. Insulate.]
   [1913 Webster]
   1. An island. [Poetic]
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            Imperial rule of all the seagirt isles. --Milton.
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   2. (Zool.) A spot within another of a different color, as
      upon the wings of some insects.
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The Collaborative International Dictionary of English v.0.48:

Isle \Isle\, v. t.
   To cause to become an island, or like an island; to surround
   or encompass; to island. [Poetic]
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         Isled in sudden seas of light.           --Tennyson.
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U.S. Gazetteer (1990):

Isle, MN (city, FIPS 31472)
  Location: 46.14221 N, 93.46042 W
  Population (1990): 566 (408 housing units)
  Area: 5.3 sq km (land), 1.1 sq km (water)
  Zip code(s): 56342

Moby Thesaurus II by Grady Ward, 1.0:

20 Moby Thesaurus words for "isle":
   ait, archipelago, atoll, bar, cay, continental island, coral head,
   coral island, coral reef, holm, insularity, island, island group,
   islandology, islet, key, oceanic island, reef, sandbank, sandbar