What is Check out ?
Check out is (verb) 1. (at a hotel.) to leave and pay for a room We will check out before breakfast. 2. to take luggage out of safe keeping The ticket shows that he checked out his bag at 9.15. 3. to see if something is all right I thought I heard a noise in a kitchen – I’ll just go and check it out.
source: Easier English, Student Dictionary Upper Intermediate Level