1. To announce one's departure from a hotel.
2. To try to learn someone's opinions and intentions; SYN. sound out, feel out.
3. When you check out at a store, you bring the items you want to buy to the cashier and pay for them.

1. When you check a place or thing out, you inspect it carefully or learn more about it.
2. When you check people out, you investigate them in order to learn more about them. If you say that people check out, you mean that the information they have given you about themselves, such as their education and work experience, has been investigated and found to be accurate.