a part of the trunk or a large branch of a tree that has fallen or been cut off

she tripped over a fallen log

a roaring log fire

an official record of events during the voyage of a ship or aircraft

a ship's log

an apparatus for determining the speed of a ship, originally one consisting of a float attached to a knotted line that is wound on a reel, the distance run out in a certain time being used as an estimate of the vessel's speed

the Ranfurly Shield, an interprovincial rugby union trophy competed for annually in New Zealand

errors late in the game cost them a shot at the log of wood

enter (an incident or fact) in the log of a ship or aircraft or in another systematic record

the incident has to be logged

control room staff resorted to using pen and paper to log calls

cut down (an area of forest) in order to exploit the timber commercially

there are plans to log 250,000 hectares of virgin rainforest

log values

log x

a quantity representing the power to which a fixed number (the base) must be raised to produce a given number

proportional to the logarithm to the base 10 of the concentration