1. To sign out of one's account, as on an app, website, or computer. I think I accidentally logged out of Netflix—do you know the password to get back in? Make sure you log out when you are finished using the computer at the end of the day, or another student may be able to access

2. To sign someone out of an account or computer system. In this usage, a noun or pronoun can be used between "log" and "out." The system has logged you out due because you were inactive for more than five minutes.