# What does ‘on cloud nine’ mean?

To “on cloud nine” means to extremely happy. A 20th-century American idiom, likely from a US Weather Bureau classification of high cumulonimbus clouds; not in Brewer's 1898.

## What it means

- A 20th-century American idiom, likely from a US Weather Bureau classification of high cumulonimbus clouds; not in Brewer's 1898.

## Action steps

1. Everyday superlative for delight.
2. Example: She's been on cloud nine since the engagement.

## Sources

- [Brewer's Dictionary of Phrase and Fable (1898) — Internet Archive scan](https://archive.org/details/brewers-dictionary-of-phrase-and-fable)

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