flight of fancy
An unrealistic idea or fantastic notion, a pipe dream. For example, She engaged in flights of fancy, such as owning a million-dollar house. This idiom uses flight in the sense of “a soaring of the imagination,” a usage dating from the mid-1600s.
Words nearby flight of fancy
flight level,
flight lieutenant,
flight line,
flight management systems,
flight nurse,
flight of fancy,
flight of ideas,
flight officer,
flight path,
flight pay,
flight plan