phan ‧ tas ‧ ma ‧ go ‧ ri ‧ a /ˌfæntæzməˈɡɒriə $ fænˌtæzməˈɡɔːriə/ BrE AmE noun [countable]
[ Date: 1800-1900 ; Language: French ; Origin: phantasme (from Old French fantasme ; ⇨ ↑ phantasm ) + -agorie (probably from Greek ageirein 'to collect together' ) ]
literary a scene that is confused, changing, and strange, like something from a dream
—phantasmagorical /-ˈɡɒrɪk ə l $ -ˈɡɔː-/ adjective