There are 2 main definitions of log in English:

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log 1

Pronunciation: /lôɡ/


1A part of the trunk or a large branch of a tree that has fallen or been cut off.
Example sentences
  • Even though she knew that there would be no berries, for it was early fall, she walked deep into the woods and past fallen logs and trees to the same meadow that her mother had told her about.
  • She went into the forest, slowing only enough to avoid trees and fallen logs.
  • This group has a great diversity of roosting habits, including caves, hollow logs, tree branches, tunnels, and human houses.
branch, trunk;
piece of wood;
(logs) timber, firewood
2 (also logbook) An official record of events during the voyage of a ship or aircraft: a ship’s log
More example sentences
  • Solomon and Hart used Hudson Bay Company postal records and ships' logbooks to examine storm frequency and severity in the Beaufort Sea.
  • The FAA acquired the aircraft logbooks, and months of investigation began.
  • Most of the aircraft have no logbooks, have run-out engines and props, and need a lot of work.
2.1A regular or systematic record of incidents or observations: keep a detailed log of your activities
More example sentences
  • Residents will also be able to record incidences on logs, which will be distributed by the police.
  • Self-testing devices and devices that maintain logs to track incidents are available.
  • At the same time, White House attorneys are reviewing memos, phone logs and other documents that may be relevant to the investigation.
3An apparatus for determining the speed of a ship, originally consisting of a float attached to a knotted line wound on a reel, the distance run out in a certain time being used as an estimate of the vessel’s speed.
Example sentences
  • Traditionally, a vessel's speed was determined using a log and line - a float on the end of a line knotted at precise intervals and tossed overboard.
  • One method of keeping direction, the log and the line, is generally discounted when a ship is sailing by compass correctly; this is true of the Pequod.

verb (logs, logging, logged)

[with object]
1Enter (an incident or fact) in the log of a ship or aircraft or in another systematic record: the incident has to be logged the red book where we log our calls
More example sentences
  • ‘We are still at the same stage,’ said a Garda spokesperson who could not give any indication as to when the system would begin to log racist incidents.
  • This detail is logged into the system, and so is the fact that an engineer is required to visit the client.
  • Two police forces, the national rail operating system and the local train service have all logged the incident.
register, record, make a note of, note down, write down, jot down, put in writing, enter, file
1.1(Of a ship, aircraft, or pilot) achieve (a certain distance, speed, or time): she had logged more than 12,000 miles since she had been launched
More example sentences
  • By the end of the month, the aircraft had logged about 26 hours of flying time during an equal number of test flights.
  • The leading maxis were logging average speeds of between 13 and 15 knots and were still on course to smash the current crossing record of 14 days and five hours.
  • Many of these aircraft have logged more than 20,000 hr.
attain, achieve, chalk up, make, do, go
1.2Make a systematic recording of (events, observations, or measurements): the virus can log keystrokes that you make when you access all sorts of services
More example sentences
  • Even more worrying is the way enquiries are logged.
  • Bugbear, another blended threat, spread through network shares but also logged keystrokes and functioned as a back door.
  • She joined the summer fieldtrips in 2002 and 2003, and has been the lab scribe, logging the group's daily trials and travails.
2Cut down (an area of forest) in order to exploit the timber commercially.
Example sentences
  • Deny said local residents had been persuaded by the owners of several timber companies to log areas within KEL, including the protected Mount Leuser National Park.
  • Approximately 200 meters on either side of the ‘priority one’ area were selectively logged.
  • According to Bapedal, the Indonesian government's environment agency, 57 timber companies are logging a massive 11 million hectare area in the region.
cut down trees, chop down trees, fell trees, clear cut, harvest trees


(as) easy as falling off a log

informal Very easy.
Example sentences
  • These guys have had a great run, but they've seen as well that it's not as easy as falling off a log - particularly in distribution.
  • If they've got a sensible database-driven-automatic-router-building widget (I'm sure there's a good name for that), then it's as easy as falling off a log.
  • What's needed is a mechanism that makes those options as easy as falling off a log.

Phrasal verbs


log in (or on)

Go through the procedures to begin use of a computer, database, or system.
Example sentences
  • Since you are already identifying users when they log in, returning preferred style sheets would be a snap.
  • In order to get access, a user should log in into the system.
  • Users who have not logged in to the system are invited to do so if they already have an account or to join the system as a member if they do not yet have an account.
sign in, register, enter, log on

log off (or out)

Go through the procedures to conclude use of a computer, database, or system.
Example sentences
  • Remember that your computer will still log off automatically if you do not use use it for more than 30 minutes.
  • If that user logs off the workstation, the TP User becomes the user who has been logged onto the system the longest.
  • She logs off and logs back on and she gets a message that her account is locked out.


Middle English (in the sense 'bulky mass of wood'): of unknown origin; perhaps symbolic of the notion of heaviness. sense 3 of the noun originally denoted a thin quadrant of wood loaded to float upright in the water, whence 'ship's journal' in which information from the log board was recorded.

  • The word log is first recorded in the Middle Ages in the sense ‘a bulky mass of wood’. The ship's log or official record of events during the voyage got its name from a device used to find out the rate of a ship's motion, a thin quarter-circle of wood loaded so as to float upright in the water and fastened to a line wound on a reel ( see knot). The captain would record the information obtained from this in a journal, or log. See also jam, sleep

Words that rhyme with log

agog, befog, blog, bog, clog, cog, dog, flog, fog, grog, hog, Hogg, hotdog, jog, nog, prog, slog, smog, snog, sprog, tautog, tog, trog
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There are 2 main definitions of log in English:

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log 2

Pronunciation: /lôɡ/


Short for logarithm. [as modifier]: log tables [prefixed to a number or algebraic symbol]: log x
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