Moderate as in castle in the air A fanciful or impractical idea or project, existing only in one's imagination or dreams. Clear All
3 Example Sentences Showcasing the Meaning of 'Castle In The Air'
Launching a startup without any capital proved to be a castle in the air for the aspiring entrepreneur.
The dream of achieving world peace overnight remains a castle in the air for many nations.
The inventor spent years working on a groundbreaking idea, which some considered a mere castle in the air.
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