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| part of speech: |
phrase |
| definition: |
When you check in, you tell someone in an official way that you have arrived or that you are ready for something. When you arrive at a hotel, you have to check in. Before you fly somewhere, you have to check in.
While Liam's dad was checking in at the hotel, Liam went with his sister to look at the swimming pool. |
| related words: |
come, report |
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