out of the blue
/aʊt ɒv ðə bluː/
"out-of-the-blue" is a 12-letter English headword indexed on PlainSpell.
The verdict
“out of the blue” is uncommon English (outside the top frequency list), classed as a prep_phrase. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 15
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Unexpectedly; without warning or preparation.
| Property | Value |
|---|---|
| Headword | out of the blue |
| Language | English |
| Part of speech | Prep_phrase |
| IPA | /aʊt ɒv ðə bluː/ |
| Letters | 15 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “out of the blue” sits in English frequency
Rare enough to double-check
out of the blue is uncommon English outside the top frequency list, classed as aprep_phrase, transcribed /aʊt ɒv ðə bluː/. Rarity is why readers land here mid-draft. Gloss: "Unexpectedly; without warning or preparation.".
The misspelling generator found no plausible variants for out of the blue, since its letter sequence doesn't invite the usual edit-distance slips. Our dataset records no confusable match here, which tends to mean the word is visually distinctive enough to stand on its own.
Etymologically, the entry records: Short for out of the blue sky, likening an unexpected event to lightning or rain coming suddenly from a cloudless sky. The correct English form is out of the blue, spelled O-U-T- -O-F- -T-H-E- -B-L-U-E.
Definition
- 1Unexpectedly; without warning or preparation.
Etymology
Short for out of the blue sky, likening an unexpected event to lightning or rain coming suddenly from a cloudless sky.
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
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Using “out of the blue”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is O-U-T- -O-F- -T-H-E- -B-L-U-E - every other letter order is a misspelling in standard orthography.
- Say it as /aʊt ɒv ðə bluː/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Browse more English words and confusable pairs in the same reference. English words
Data Source
Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.