What is "log in"

log in \log in\, log on \log on\, v. i. (Computers) To establish communication with a host computer from a terminal or remote computer.

1963 in the computing sense, from log (v.2) + in (adv.).

vb. (context computing English) To gain access to a computer system, usually by providing a previously agreed upon username and password.

v. enter a computer; "Have you logged in lately?" [syn: log on, log-in] [ant: log out]