noun

1. an early type of magic-lantern show consisting of various optical illusions in which objects rapidly change size, blend into one another, etc.
2. a rapidly changing series of things seen or imagined, as the figures or events of a dream
3. any rapidly changing scene

Etymology: Fr fantasmagorie < Gr phantasma, phantasm + agoreuein, to speak in public < ageirein, to assemble (see gregarious): prob. infl. by Fr allegorie, allegory