expression

on cloud nine

extremely happy

In Idioms & Sayings

In more detail

(idiom) extremely happy or in a state of bliss; feeling as though you are floating on air because of joy or excitement

Examples

Ever since she got engaged, she's been on cloud nine.

How to use on cloud nine

This idiom expresses an extreme state of happiness or euphoria, typically following a joyful event like falling in love, winning something important, or receiving great news. It is widely used in both spoken and written English across informal and moderately formal contexts. The phrase suggests not just happiness but a dreamlike, almost detached blissfulness.

Common phrases

be on cloud nine
put someone on cloud nine
send someone on cloud nine
walking on cloud nine
completely on cloud nine

Synonyms

over the moon · on top of the world · walking on air · in seventh heaven · ecstatic

Opposites

down in the dumps · miserable · devastated

A common mistake

Learners sometimes confuse this with similar cloud-related idioms (head in the clouds, under a cloud) which have different meanings; additionally, some non-native speakers may incorrectly say 'in cloud nine' instead of 'on cloud nine'.

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