Learn how to use castle in the air in a English sentence. Over 4 hand-picked example sentences with translations. Mobile-friendly and free. Powered by Mate.
What you are saying is nothing but building a castle in the air.
It is foolish of you to build a castle in the air while forgetting to drive in pilings for its foundation.
Your idea is, as it were, a castle in the air.
She built a castle in the air.
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