- A visionary project or scheme; a day-dream; an idle fancy; a pipe dream; any program, need, or indisputable fact that is not likely to be previously understood; a near impossibility.
- a visionary project; a baseless scheme; an air castle; -- sometimes called a castle in Spain (F. Château en Espagne).
- absentminded dreaming while awake
- Definition for "castle in the air"
- A visionary project or scheme; a day-dream; an…
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- Synonym for "castle in the air"
- Hypernym for "castle in the air"