1. To record one's departure in a list, log book, or register. All visitors must sign out when they are leaving the premises. Please remember to sign out when you are finished your shift, or else your pay for that period may not be calculated correctly.

2. To end or announce the end of a program, transmission, broadcast, or other mass communication. And that brings us to the end of today's show. Until next time, this is your host, John Bicksby, signing out.

3. To end one's session in a digital account or network (typically one accessed by having entered personal credentials); to log out. If you're using a public computer, always make sure you sign out at the end of your session. You should always sign out of these websites after you're finished shopping.

4. To cause someone's session in a digital account or network to be ended; to log someone out. In this usage, a noun or pronoun is usually used between "sign" and "out." Just when I was about to finalize the purchase, the site signed me out.

5. To record the temporary removal of something that one or someone else is borrowing. In this usage, a noun or pronoun can be used between "sign" and "out." You'll have to sign the equipment out if you want to take it from the lab. You can sign out three books at a time. You'll have to return them first if you want to borrow more.