noun (1), often attributive
\ ˈlȯg How to pronounce log (audio) , ˈläg \

Definition of log

 (Entry 1 of 6)

1 : a usually bulky piece or length of a cut or fallen tree especially : a length of a tree trunk ready for sawing and over six feet (1.8 meters) long
2 : an apparatus for measuring the rate of a ship's motion through the water that consists of a block fastened to a line and run out from a reel
3a : the record of the rate of a ship's speed or of her daily progress also : the full nautical record of a ship's voyage
b : the full record of a flight by an aircraft
4 : a record of performance, events, or day-to-day activities


logged; logging

Definition of log (Entry 2 of 6)

transitive verb

1a : to cut (trees) for lumber
b : to clear (land) of trees in lumbering often used with off
2 : to make a note or record of : enter details of or about in a log
3a : to move (an indicated distance) or attain (an indicated speed) as noted in a log
b(1) : to sail a ship or fly an airplane for (an indicated distance or period of time)
(2) : to have (an indicated record) to one's credit : achieve


noun (2), often attributive

Definition of log (Entry 3 of 6)

Definition of log (Entry 4 of 6)

variants: or logo-

Definition of log- (Entry 5 of 6)

: word : thought : speech : discourse logogram logorrhea

Definition of -log (Entry 6 of 6)

— see -logue

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Examples of log in a Sentence

Verb Thousands of trees have been logged in this area. The forest has been heavily logged. The company has been logging in this area for many years. Part of his job is to log all deliveries. Truck drivers log thousands of miles every week. She has only been flying for a few months, but she has already logged more than 80 hours. a pitcher who has logged more than a hundred victories
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First Known Use of log

Noun (1)

14th century, in the meaning defined at sense 1


1699, in the meaning defined at transitive sense 1a

Noun (2)

1631, in the meaning defined above

History and Etymology for log

Noun (1)

Middle English logge

Noun (2)

by shortening

Combining form

Greek, from logos — more at legend

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Time Traveler for log

Time Traveler

The first known use of log was in the 14th century

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Statistics for log

Cite this Entry

“Log.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/log. Accessed 17 Jan. 2021.

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More Definitions for log



English Language Learners Definition of log

: to cut down trees in an area for wood
: to make an official record of (something)
: to do something for (a specified distance or time)


\ ˈlȯg How to pronounce log (audio) , ˈläg \

Kids Definition of log

 (Entry 1 of 2)

1 : a large piece of a cut or fallen tree
2 : a long piece of a tree trunk ready for sawing
3 : the record of a ship's voyage or of an aircraft's flight the captain's log
4 : a record of performance, events, or daily activities a computer log


logged; logging

Kids Definition of log (Entry 2 of 2)

1 : to engage in cutting trees for timber
2 : to make an official record of We log all deliveries to the store.
log on
: to connect to a computer or network



Legal Definition of log

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