Definition of supercivilization
: a highly developed civilization : a society that has advanced to a very high level of cultural or technological development After a claimed UFO encounter at White Sands, New Mexico, … [Daniel] Fry founded Understanding, Inc. His contacts professed to be the remnants of a past supercivilization on earth that had destroyed itself through war, and they did not want that disaster repeated.— Robert S. Ellwood and Gregory D. Alles
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