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English definition of “log-in”

log-in

noun [C] ( also log-on, login, logon)
 
 
IT, INTERNET
the set of letters and numbers that you write on a computer screen in order to connect to a computer system: If you're worried about other people accessing your information, you can make it a private log-in. The site helps users keep track of their various logons.login data/information Do not share your log-in information with anyone. →  Compare username
the process of using a log-in to connect to a computer system: To help speed up log-in have your username and password ready.
(Definition of log-in noun from the Cambridge Business English Dictionary © Cambridge University Press)
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