log

Noun

• measuring instrument that consists of a float that trails from a ship by a knotted line in order to measure the ship's speed through the water

• a written record of events on a voyage (of a ship or plane)

• a written record of messages sent or received
  • they kept a log of all transmission by the radio station
    
  • an email log
    

• the exponent required to produce a given number

• a segment of the trunk of a tree when stripped of branches

Verb

• cut lumber, as in woods and forests

• enter into a log, as on ships and planes

Related words

• Synonyms: 
  logarithm , lumber