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| Colorful English! | ||||
| Word or Phrase: | Part of Speech: | Idiom or General?: | Usage? | Restricted? |
| out of the blue | idiomatic phrase | idiomatic | fairly common | No |
| Meaning: | ||||
| all of a sudden, without prior notice, without warning | ||||
| Example(s): | ||||
| His proposal to get married came out of the blue. | ||||
| Note: | ||||