We found 11 dictionaries that define the word air castle:

General (10 matching dictionaries)

1. air castle: Merriam-Webster
2. air castle: Vocabulary.com
3. air-castle, air castle: Wordnik
4. Air castle, air castle: Dictionary.com
5. air castle: Rhymezone
6. air castle: Mnemonic Dictionary
7. air castle: TheFreeDictionary.com
8. air castle: FreeDictionary.org
9. air castle: Merriam-Webster
10. air castle: Wiktionary

Computing (1 matching dictionary)

11. air castle: Encyclopedia

(Note: See air_castles as well.)

Definitions from Wiktionary (air castle) ▸ noun:  Synonym of castle in the air Opposite: reality, practicality, realism ▸ Words similar to air castle ▸ Usage examples for air castle ▸ Idioms related to air castle ▸ Wikipedia articles (New!) ▸ Words that often appear near air castle ▸ Rhymes of air castle ▸ Invented words related to air castle