12 Example Sentences Showcasing the Meaning of 'Castle In The Air'
Despite his ambitious plans, building a space station in his backyard was just a castle in the air.
Little Timmy's dream of befriending a talking unicorn remained a castle in the air.
The notion of a perpetual motion machine turned out to be nothing more than a castle in the air.
Launching a startup without any capital proved to be a castle in the air for the aspiring entrepreneur.
John's plan to learn ten languages in a month was merely a castle in the air.
The dream of achieving world peace overnight remains a castle in the air for many nations.
Winning the lottery and retiring early turned out to be just a castle in the air for Jane.
Tom's idea of a self-cleaning house sounded more like a castle in the air than a practical innovation.
Establishing a colony on Mars is currently considered a castle in the air by most scientists.
Despite warnings from practical advisors, he continued to pursue his castle in the air, hoping it would become a reality.
The scientist's groundbreaking theory started as a mere castle in the air before extensive research validated its legitimacy.
Despite the challenges, the team embarked on the project, turning their castle in the air into a successful reality.