We found 13 dictionaries that define the word castles in the air:

General (9 matching dictionaries)

1. castles in the air: Merriam-Webster
2. castles in the air: Oxford Learner's Dictionaries
3. castles in the air: Vocabulary.com
4. castles in the air: Cambridge Advanced Learner's Dictionary
5. castles in the air: Wiktionary
6. castles in the air: Dictionary.com
7. Castles in the Air (play), Castles in the Air (song): Wikipedia, the Free Encyclopedia
8. Castles in the air: TheFreeDictionary.com
9. castles in the air: Longman Dictionary of Contemporary English

Business (1 matching dictionary)

10. Castles in the air: Legal dictionary

Computing (1 matching dictionary)

11. Castles in the air: Encyclopedia

Medicine (1 matching dictionary)

12. Castles in the air: Medical dictionary

Miscellaneous (1 matching dictionary)

13. castles in the air: Idioms

Phrases: build castles in the air, more... ▸ Words similar to castles in the air ▸ Usage examples for castles in the air ▸ Idioms related to castles in the air ▸ Wikipedia articles (New!) ▸ Words that often appear near castles in the air ▸ Rhymes of castles in the air ▸ Invented words related to castles in the air