log¹ (lôg, lŏg)
n.

1. 1. A usually large section of a trunk or limb of a fallen or felled tree.
   2. A long thick section of trimmed, unhewn timber.
2. Nautical.
   1. A device trailed from a ship to determine its speed through the water.
   2. A record of a ship's speed, its progress, and any shipboard events of navigational importance.
   3. The book in which this record is kept.
3. A record of a vehicle's performance, as the flight record of an aircraft.
4. A record, as of the performance of a machine or the progress of an undertaking: a computer log; a trip log.

v., logged, log·ging, logs.

v.tr.

1. 1. To cut down, trim, and haul the timber of (a piece of land).
   2. To cut (timber) into unhewn sections.
2. To enter in a record, as of a ship or an aircraft.
3. To travel (a specified distance, time, or speed): logged 30,000 air miles in April.
4. To spend or accumulate (time): had logged 25 years with the company.

v.intr.
To cut down, trim, and haul timber.

phrasal verbs:

log in or on

1. To enter into a computer the information required to begin a session.

log out or off

1. To enter into a computer the command to end a session.

[Middle English logge.]

log² (lôg, lŏg)
n.
A logarithm.

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The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.

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