log1

noun

• 1a part of the trunk or a large branch of a tree that has fallen or been cut off: she tripped over a fallen log [as modifier]:a roaring log fire

• 2 (also logbook) an official record of events during the voyage of a ship or aircraft:a ship’s log
• a regular or systematic record of incidents or observations:keep a detailed log of your activities

• 3an apparatus for determining the speed of a ship, originally one consisting of a float attached to a knotted line that is wound on a reel, the distance run out in a certain time being used as an estimate of the vessel’s speed.

verb (logs, logging, logged)

• 1enter (an incident or fact) in the log of a ship or aircraft or in another systematic record:the incident has to be logged
• (of a ship, aircraft, or pilot) achieve (a certain distance, speed, or time):she had logged more than 12,000 miles since her launch
• make a systematic recording of events, observations, or measurements:the virus can log keystrokes that you make when you log on to all sorts of services

• 2cut down (an area of forest) in order to exploit the timber commercially: there are plans to log 250,000 hectares of virgin rainforest