Definition of "phantasmagoric"

phantasmagoric

adjective
comparative more phantasmagoric, superlative most phantasmagoric
1. Characterized by or pertaining to rapid changes in light intensity and colour.
  Quotations
  As early as 1965, however, Tom Wolfe sensed the importance of "electrographic architecture," the phantasmagoric billboards along 79.
  2000, Postmodern Studies, volume 28, page 127
2. Characterized by or pertaining to a dreamlike blurring of real and imaginary elements.