Advanced as in pie in the sky A fanciful or impractical idea, often referred to as a pipe dream. Clear All
3 Example Sentences Showcasing the Meaning of 'Castle In The Air'
Despite facing numerous challenges, building a sustainable society on Mars is not just a castle in the air.
Creating a utopian society where everyone is equal can sometimes be dismissed as a castle in the air.
After hours of brainstorming, the team realized their initial business plan was more of a castle in the air than a viable strategy.
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