Thule tho͞o´lē [key], name given by the ancients to the most northerly land of Europe. It was an island discovered and described (c.310 BC) by the Greek navigator Pytheas and variously identified with Iceland, Norway, and the Shetland Islands. The phrase Ultima Thule is used figuratively to denote the most distant goal of human endeavor or a land remote beyond all reckoning.

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