cloud nine

/ˈklaʊd ˈnaɪn/

//ˈklaʊd ˈnaɪn// noun

"cloud-nine" is a 9-letter English headword indexed on PlainSpell.

The verdict

“cloud nine” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.

Unranked
below top-frequency English
10
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Often in the phrase on cloud nine: a state of bliss, elation or happiness.

Corpus desk

Index EN-cloud-nine · cloud nine · English

cloud nine · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MEGA 10 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "C" thin
  • PHOTO-UNK Peer pending

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Key facts for cloud nine
PropertyValue
Headwordcloud nine
LanguageEnglish
Part of speechNoun
IPA/ˈklaʊd ˈnaɪn/
Letters10
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “cloud nine” in English

cloud ninesits beyond the 100,000 most-frequent English words, in the long tail of technical, archaic, or otherwise rare vocabulary where spelling doubt tends to strike hardest.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

cloud nine is uncommon English outside the top frequency list, classed as anoun, transcribed /ˈklaʊd ˈnaɪn/. Rarity is why readers land here mid-draft. 2 senses are on record.

The misspelling generator found no plausible variants for cloud nine, which points to an orthography that plays by predictable English rules. No confusable counterpart is on file for this word, which typically means the spelling is too distinctive to be mistaken for another word.

Etymologically, the entry records: The origin of sense 1 (“a state of bliss”) is uncertain; however, the following etymology has been suggested: * The first edition of the International Cloud Atlas (1896), which defined ten types of cloud, described the ninth type as the cumulonimbus which r… The correct English form is cloud nine, spelled C-L-O-U-D- -N-I-N-E.

Definition

  1. 1
    Often in the phrase on cloud nine: a state of bliss, elation or happiness.
  2. 2
    A state of fantastic or impractical dreaming or thinking.

Recorded use

Wiktionary examples

These source excerpts show how cloud nine appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. He was on cloud nine for days after she agreed to marry him.
  2. In your zeal you may not feel you are undertaking a thing for your own sake but think you are doing so for God. Nevertheless, you should remember that at the time of great excitement as though you were on cloud nine, you may perhaps be most fleshly!

Etymology

The origin of sense 1 (“a state of bliss”) is uncertain; however, the following etymology has been suggested: * The first edition of the International Cloud Atlas (1896), which defined ten types of cloud, described the ninth type as the cumulonimbus which rises to 10 km (6.2 miles), the highest a cloud can be. Compare cloud seven (“state of complete happiness or euphoria”), which may have originated from confusion of cloud nine with seventh heaven. Sense 2 (“a state of fantastic or impractical dreaming or thinking”) may be due to a confusion between sense 1 and the phrase head in the clouds.

Synonyms

This word in other languages

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "cloud nine"?
"cloud nine" is spelled C-L-O-U-D- -N-I-N-E. The IPA pronunciation is /ˈklaʊd ˈnaɪn/.
What does "cloud nine" mean?
As a noun, "cloud nine" means: Often in the phrase on cloud nine: a state of bliss, elation or happiness.
How do you pronounce "cloud nine"?
The IPA (International Phonetic Alphabet) transcription for "cloud nine" is /ˈklaʊd ˈnaɪn/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "cloud nine"?
The origin of sense 1 (“a state of bliss”) is uncertain; however, the following etymology has been suggested: * The first edition of the International Cloud Atlas (1896), which defined ten types of cloud, described the ninth type as the cumulonimb... See the full etymology section above for more details.
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Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list