0 to leave a hotel after paying and returning your room key: --
1 to leave a hotel after paying for your room and services: --
2 if information, facts, etc. check out, you can prove that they are true or correct: --
I noticed an elderly lady at reception checking out when we came down for breakfast.
Could you ask the taxi driver to wait - we're just checking out.
When she went to check out, the hotel manager presented her with a huge phone bill.
Please remember to leave your room keys at reception when you check out.