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[lawg, log] /lɔg, lɒg/
a portion or length of the trunk or of a large limb of a felled tree.
something inert, heavy, or not sentient.
Nautical. any of various devices for determining the speed of a ship, as a chip log or patent log.
any of various records, made in rough or finished form, concerning a trip made by a ship or aircraft and dealing with particulars of navigation, weather, engine performance, discipline, and other pertinent details; logbook.
Movies. an account describing or denoting each shot as it is taken, written down during production and referred to in editing the film.
a register of the operation of a machine.
Also called well log. a record kept during the drilling of a well, especially of the geological formations penetrated.
Computers. any of various chronological records made concerning the use of a computer system, the changes made to data, etc.
Radio and Television. a written account of everything transmitted by a station or network.
Also called log of wood. Australian Slang. a lazy, dull-witted person; fool.
verb (used with object), logged, logging.
to cut (trees) into logs:
to log pine trees for fuel.
to cut down the trees or timber on (land):
We logged the entire area in a week.
to enter in a log; compile; amass; keep a record of:
to log a day's events.
to make (a certain speed), as a ship or airplane:
We are logging 18 knots.
to travel for (a certain distance or a certain amount of time), according to the record of a log:
We logged 30 miles the first day. He has logged 10,000 hours flying time.
verb (used without object), logged, logging.
to cut down trees and get out logs from the forest for timber:
to log for a living.
Verb phrases
log in,
  1. Also, log on, sign on. Computers. to enter identifying data, as a username or password, into a database, mobile device, or computer, especially a multiuser computer or a remote or networked system, so as to to access and use it:
    Log in to start your work session. Log in to your account to pay your bill online.
  2. to enter or include any item of information or data in a record, account, etc.
log off/out, Computers. to terminate a session.
Origin of log1
1350-1400; Middle English logge, variant of lugge pole, limb of tree; compare obsolete logget pole; see lugsail, logbook
Related forms
loggish, adjective
unlogged, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for log out
Contemporary Examples
Historical Examples
  • It will be as much as we can do to paddle the log out of sight before day breaks.

  • Youll bring every log out o that backwater or Ill know why, he thundered.

    The Boss of Wind River David Goodger (
  • Spenski swung the end of the log out to the grass for them to make good their retiring.

    Red Fleece Will Levington Comfort
  • So we sat on a log out in front of Uncle Jim Brothers's hotel, and waited for the worst to happen.

    Heart's Desire

    Emerson Hough
  • They pulled the log out of the sand, carried it to the muddy spot, and threw it into the mud where they wanted it.

    Two Little Confederates

    Thomas Nelson Page
  • It was no easy task for Sam and Andy to pull the log out of the way, as they could hardly lift it to slip the rope under.

British Dictionary definitions for log out

log out

Also log off. to disconnect a remote terminal from a multiaccess system by entering (an identification number, password, etc)
Also logout. the process by which a computer user logs out


  1. a section of the trunk or a main branch of a tree, when stripped of branches
  2. (modifier) constructed out of logs: a log cabin
  1. a detailed record of a voyage of a ship or aircraft
  2. a record of the hours flown by pilots and aircrews
  3. a book in which these records are made; logbook
a written record of information about transmissions kept by radio stations, amateur radio operators, etc
  1. a device consisting of a float with an attached line, formerly used to measure the speed of a ship See also chip log
  2. heave the log, to determine a ship's speed with such a device
(Austral) a claim for better pay and conditions presented by a trade union to an employer
like a log, without stirring or being disturbed (in the phrase sleep like a log)
verb logs, logging, logged
(transitive) to fell the trees of (a forest, area, etc) for timber
(transitive) to saw logs from (trees)
(intransitive) to work at the felling of timber
(transitive) to enter (a distance, event, etc) in a logbook or log
(transitive) to record the punishment received by (a sailor) in a logbook
(transitive) to travel (a specified distance or time) or move at (a specified speed)
Word Origin
C14: origin obscure


short for logarithm
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for log out



unshaped large piece of tree, early 14c., of unknown origin. Old Norse had lag "felled tree" (from stem of liggja "to lie"), but on phonological grounds many etymologists deny that this is the root of English log. Instead, they suggest an independent formation meant to "express the notion of something massive by a word of appropriate sound." OED compares clog (n.) in its original Middle English sense "lump of wood." Log cabin (1770) in American English has been a figure of the honest pioneer since the 1840 presidential campaign of William Henry Harrison. Falling off a log as a type of something easy to do is from 1839.



"to enter into a log-book," 1823, from log (n.2). Meaning "to attain (a speed) as noted in a log" is recorded by 1883. Related: Logged; logging.



"record of observations, readings, etc.," 1842, sailor's shortening of log-book "daily record of a ship's speed, progress, etc." (1670s), from log (n.1) which is so called because a wooden float at the end of a line was cast out to measure a ship's speed. General sense by 1913.



"to fell a tree," 1717; earlier "to strip a tree" (1690s), from log (n.1). Related: Logged; logging.

Online Etymology Dictionary, © 2010 Douglas Harper
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log out in Science
A logarithm.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Slang definitions & phrases for log out


Related Terms

beat one's meat, easy as pie

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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Idioms and Phrases with log out


In addition to the idiom beginning with
The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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