log

(noun) a segment of the trunk of a tree when stripped of branches.

(noun) the exponent required to produce a given number. Synonyms: logarithm.

(noun) a written record of messages sent or received. Examples: "They kept a log of all transmission by the radio station." "An email log."

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

(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.

(verb) enter into a log, as on ships and planes.

(verb) cut lumber, as in woods and forests. Synonyms: lumber.