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fantast

American  
[fan-tast] / ˈfæn tæst /
Or phantast

noun

  1. a visionary or dreamer.


fantast British  
/ ˈfæntæst /

noun

  1. a dreamer or visionary

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of fantast

First recorded in 1580–90; from German, Fantast, Phantast, from Greek phantastḗs “boaster”; a derivative of the verb phantázein “to make visible, present to the eye or mind”