Origin of log

1
1350–1400; Middle English logge, variant of lugge pole, limb of tree; compare obsolete logget pole; see lugsail, logbook
Related formslog·gish, adjectiveun·logged, adjective

login

[noun lawg-in, log-; verb lawg-in, log-]Digital Technology

noun Also log-in, logon.

the act of logging in to a database, mobile device, or computer, especially a multiuser computer or a remote or networked computer system.
a username and password that allows a person to log in to a computer system, network, mobile device, or user account.

verb (used without object)

to log in: Login with your new password. See log1(def 17).

Usage note

Many who are neither professionals in the computer field nor amateur tech enthusiasts condemn the use of the solid form login as a verb, and with reason. It doesn’t behave like a normal verb. You cannot say you have loginned, and you are never in the process of loginning. Moreover, you cannot even ask someone to login you; you must ask that person to log you in. Clearly, it is the two-word phrase log in that functions fully as an English verb and not the solid form. Normally, we would expect log in, the verb phrase and login, the noun to behave in the same way as similar pairs: blow out/blowout, crack down/crackdown, hang up/hangup, splash down/splashdown, turn off/turnoff, where the two-word phrase is a verb and the one-word form a noun.
And yet, this gluing together of terms like login, logon, backup, and setup as verbs is common, especially in writing about computers. Not for everyone, however. Some well-known software companies, for example, carefully maintain the distinction in their programs and documentation.
But habits are difficult to change. Those who react to the one-word verb as an error will probably have to get used to it, and those who use the one-word verb will have to recognize that others will see it and wince.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019


British Dictionary definitions for log in

log in

verb

Also: log on to enter (an identification number, password, etc) from a remote terminal to gain access to a multiaccess system

noun

Also: login the process by which a computer user logs in

log

1

noun

  1. a section of the trunk or a main branch of a tree, when stripped of branches
  2. (modifier)constructed out of logsa 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 shipSee also chip log
  2. heave the logto determine a ship's speed with such a device
Australian 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 or logged

(tr) to fell the trees of (a forest, area, etc) for timber
(tr) to saw logs from (trees)
(intr) to work at the felling of timber
(tr) to enter (a distance, event, etc) in a logbook or log
(tr) to record the punishment received by (a sailor) in a logbook
(tr) to travel (a specified distance or time) or move at (a specified speed)

Word Origin for log

C14: origin obscure

log

2

noun

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

Word Origin and History for log in
v.

1963 in the computing sense, from log (v.2) + in (adv.).

log

n.1

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.

log

v.2

"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.

log

n.2

"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.

log

v.1

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

login

in the computer sense, as one word, by 1983, from log in.

Online Etymology Dictionary, © 2010 Douglas Harper

Science definitions for log in

log

[lôg]

A logarithm.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Idioms and Phrases with log in

log in

Also, log on. Enter into a computer the information needed to begin a session, as in I logged in at two o'clock, or There's no record of your logging on today. These expressions refer especially to large systems shared by numerous individuals, who need to enter a username or password before executing a program. The antonyms are log off and log out, meaning “to end a computer session.” All these expressions derive from the use of log in the nautical sense of entering information about a ship in a journal called a log book. [c. 1960]

log

In addition to the idiom beginning with log

  • log in

also see:

  • easy as pie (rolling off a log)
  • like a bump on a log
  • sleep like a log
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.