imaginarycastle

noun
UK /ɪˈmædʒɪnəri ˈkɑːsəl/
US /ɪˈmædʒəˌnɛri ˈkæsəl/

A pretend castle that you make up in your mind and cannot really touch.

The children built an imaginary castle in the clouds and pretended to be knights.


OTHER MEANINGS

2. A castle that appears only in a story or picture, not in real life.

The book's hero lived in an imaginary castle guarded by friendly dragons.

3. A fun name for a blanket fort or play fort that kids pretend is a castle.

With pillows and sheets, the living room became our imaginary castle.

4. A plan or hope that is not realistic, like a castle in the air.

His scheme to become king was just an imaginary castle.