FANTASY | English meaning – Cambridge Dictionary

fantasy noun uk / ˈfæn.tə.si / us / ˈfæn.tə.si / B2 [ C or U ] a pleasant situation that you enjoy thinking about but is unlikely to happen, or the activity of imagining things like this: Steve’s favourite fantasy was to own a big house and a flashy car. sexual fantasies She retreated into a fantasy world, where she could be anything she wanted.

https://dictionary.cambridge.org/dictionary/english/fantasy