Dictionary definition · fantasy
noun
- imagination unrestricted by reality"a schoolgirl fantasy"
- fiction with a large amount of imagination in it"she made a lot of money writing romantic fantasies"
- something many people believe that is false"they have the illusion that I am very wealthy"
verb
- indulge in fantasies"he is fantasizing when he says he plans to start his own company"
Source: Open English WordNet (CC BY 4.0).