/lɒg ||; lɔg/verb [T] (logging;logged) to keep an official written record of sth 记航海或飞行日志 log in/on to perform the actions that allow you to start using a computer system （计算机）登录，登入: You need to key in your password to log on. 你要键入密码才能登入。 log off/out to perform the actions that allow you to finish using a computer system （计算机）退出，注销