log on Definition

log¹
noun

1a. Part of a tree trunk or branch that has been cut, especially for firewood;
1b. A tree trunk or large branch that has fallen to the ground.
2. A detailed record of events occurring during the voyage of a ship or aircraft, etc.

Thesaurus: record, diary, journal, account, chart, daybook, tally.
3. A logbook.
4. A float, originally made of wood, attached by a line to a ship and used for measuring its speed.

verb logged, logging

1a. To record (distances covered on a journey, events, etc) in a book or logbook;
1b. To record (speed) over a set distance.
2. To cut (trees or branches) into logs.
intr
3. To cut logs.

Idiom: sleep like a log

To sleep very soundly.

Etymology: 14c.

Phrasal Verb: log in or on

To start a session on a computer system, usually one shared by several users and requiring a password to be entered;To make a connection with another computer over a network.

Phrasal Verb: log out or off

To end a session on a computer system by keying in a closing command (noun 7);To close a connection with another computer which has been accessed over a network.