Advanced A fanciful or unrealistic idea or plan, existing only in the imagination; something imagined but unlikely to happen. Clear All
4 Example Sentences Showcasing the Meaning of 'Castle In The Air'
The entrepreneur's vision of a self-sustaining lunar colony was often dismissed as a mere castle in the air.
The scientist's proposal for a time-travel device was met with skepticism, labeled by critics as nothing more than a castle in the air.
The proposal to build an eco-friendly city in the heart of the desert was initially seen as a castle in the air but gained support over time.
The inventor's dream of creating a perpetual motion machine was dismissed as a castle in the air by many skeptical scientists.
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