Quixotic – Having romantic and unrealistic ideas of things that are impossible or impractical; extremely idealistic
Note: The word quixotic comes from the satirical character, Don Quixote, who had unrealistic ideas about romance and chivalry.
She must quit wanting an exotic (quixotic) garden, it's unrealistic and impractical.
Examples of quixotic in a sentence
Although the plan for killing the monster was quixotic, it was the town’s only hope.
It's quixotic to believe you'll be able to just walk into a prison and break out your girlfriend.
Jennie's goal of becoming a Hollywood celebrity was deemed quixotic by many, but she proved them wrong by becoming a multi-million dollar actress.