Phrase guide

out of the blue

prep_phrase · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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  • /aʊt əv ðə ˈbluː/
  • Australia: Recorded audio is listed in the source snapshot.

1

prep_phrase

Meaning 1

Unexpectedly; without warning or preparation.

Definition source: English Wiktionary via Wiktextract

Usage: idiomatic

Examples

  • After I hadn’t heard from her in six months, she called me out of the blue to meet for lunch.
  • I really can't understand how something like this could simply pop up out of the blue.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adverb

Meaning 2

in a way that was not expected

Definition source: Princeton WordNet 3.0

Examples

  • her brother showed up at the wedding out of the blue

Meaning relationships

Synonyms: unexpectedly

Antonyms: none provided

History

Etymology

Short for out of the blue sky, likening an unexpected event to lightning or rain coming suddenly from a cloudless sky.

Across languages

Translations

58 source translations are retained for this English entry.

  • Afrikaans: uit die bloute — unexpectedly
  • Arabic: فَجْأَةً (fajʔatan) — unexpectedly
  • Arabic: عَلَى حِينِ غِرَّةٍ (ʕalā ḥīni ḡirratin) — unexpectedly
  • Arabic: عَلَى حِينِ غَفْلَةٍ (ʕalā ḥīni ḡaflatin) — unexpectedly
  • Chinese Mandarin: 出其不意 (chūqíbùyì) — unexpectedly
  • Chinese Mandarin: 出乎意料 (chūhūyìliào) — unexpectedly
  • Czech: zčistajasna — unexpectedly
  • Danish: ud af det blå — unexpectedly
  • Dutch: uit het niets — unexpectedly
  • Dutch: zomaar — unexpectedly
  • Finnish: yllättäen — unexpectedly
  • Finnish: kuin salama kirkkaalta taivaalta — unexpectedly
  • French: comme un cheveu sur la soupe — unexpectedly
  • French: comme un chien dans un jeu de quilles — unexpectedly
  • French: de nulle part — unexpectedly
  • German: (wie) aus heiterem Himmel — unexpectedly
  • German: (wie) aus blauem Himmel — unexpectedly
  • German: aus dem Nichts — unexpectedly
  • German: aus dem Blauen heraus — unexpectedly
  • Hungarian: a semmiből — unexpectedly
  • Hungarian: hirtelen — unexpectedly
  • Hungarian: váratlanul — unexpectedly
  • Hungarian: meglepetésszerűen — unexpectedly
  • Icelandic: eins og þruma úr heiðskíru lofti — unexpectedly
  • Icelandic: eins og skrattinn úr sauðaleggnum — unexpectedly
  • Icelandic: sem reiðarslag — unexpectedly
  • Icelandic: eins og þruma úr heiðríkju — unexpectedly
  • Icelandic: öllum að óvörum — unexpectedly
  • Italian: inaspettatamente — unexpectedly
  • Italian: di punto in bianco — unexpectedly
  • Italian: come un fulmine a ciel sereno — unexpectedly
  • Italian: dal nulla — unexpectedly
  • Japanese: 藪から棒 — unexpectedly
  • Japanese: 出し抜け — unexpectedly
  • Korean: 갑자기 (gapjagi) — unexpectedly
  • Latin: inexspectate — unexpectedly
  • Lithuanian: lyg perkūnas iš giedro dangaus — unexpectedly
  • Māori: matawhawhati — unexpectedly
  • Māori: whāia ka/kua (nei) — unexpectedly
  • Norwegian: ut av det blå — unexpectedly
  • Norwegian: som lyn fra klar himmel — unexpectedly
  • Polish: jak grom z jasnego nieba — unexpectedly
  • Polish: ni stąd, ni zowąd — unexpectedly
  • Portuguese: do nada — unexpectedly
  • Portuguese: da cartola — unexpectedly
  • Portuguese: à toa — unexpectedly
  • Romanian: din senin — unexpectedly
  • Serbo-Croatian: ка̏о гро̑м из ве̏дра не̏ба — unexpectedly
  • Serbo-Croatian: kȁo grȏm iz vȅdra nȅba — unexpectedly
  • Spanish: de la nada — unexpectedly
  • Spanish: de repente — unexpectedly
  • Spanish: de sopetón — unexpectedly
  • Spanish: como caído de las nubes — unexpectedly
  • Swedish: som en blixt från klar himmel — unexpectedly
  • Ukrainian: як сніг на голову (jak snih na holovu) — unexpectedly
  • Ukrainian: як грім з я́сного не́ба (jak hrim z jásnoho néba) — unexpectedly
  • Ukrainian: як грім се́ред я́сного не́ба (jak hrim séred jásnoho néba) — unexpectedly
  • Vietnamese: đang không — unexpectedly