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An idea which shows a lot of imagination but which is not practical or useful in real situations.

An unrealistic idea or fantastic notion, a pipe dream.
i had a flight of fancy of becoming a kickboxing star/ martial arts champion of the world and without thinking, decided to join kickboxing club. i got my face broken in ten places and three broken ribs the second week of practice.
by Insufficient Postage February 01, 2006

Words related to flight of fancy

dream idea imaginative kickboxing whim