We found 9 dictionaries that define the word be on cloud nine:

General (8 matching dictionaries)

1. be on cloud nine: Vocabulary.com
2. be on cloud nine: Cambridge Advanced Learner's Dictionary
3. be on cloud nine: Dictionary.com
4. be on cloud nine: Rhymezone
5. be on cloud nine: FreeDictionary.org
6. be on cloud nine: Mnemonic Dictionary
7. be on cloud nine: TheFreeDictionary.com
8. be on cloud nine: Longman Dictionary of Contemporary English

Miscellaneous (1 matching dictionary)

9. be on cloud nine: Idioms

Definitions from WordNet (be on cloud nine) ▸ verb:  feel extreme happiness or elation Opposite: be down in dumps, be blue, be depressed, be unhappy ▸ Words similar to be on cloud nine ▸ Usage examples for be on cloud nine ▸ Idioms related to be on cloud nine ▸ Wikipedia articles (New!) ▸ Words that often appear near be on cloud nine ▸ Rhymes of be on cloud nine ▸ Invented words related to be on cloud nine