Noun

• S: (n) log (a segment of the trunk of a tree when stripped of branches)
• S: (n) logarithm, log (the exponent required to produce a given number)
• S: (n) log (a written record of messages sent or received) "they kept a log of all transmission by the radio station"; "an email log"
• S: (n) log (a written record of events on a voyage (of a ship or plane))
• S: (n) log (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)
• direct hyponym / full hyponym
• part meronym
• direct hypernym / inherited hypernym / sister term
• S: (n) measuring instrument, measuring system, measuring device (instrument that shows the extent or amount or quantity or degree of something)
• S: (n) instrument (a device that requires skill for proper use)
• S: (n) device (an instrumentality invented for a particular purpose) "the device is small enough to wear on your wrist"; "a device intended to conserve water"
• S: (n) instrumentality, instrumentation (an artifact (or system of artifacts) that is instrumental in accomplishing some end)
• S: (n) artifact, artefact (a man-made object taken as a whole)
• S: (n) whole, unit (an assemblage of parts that is regarded as a single entity) "how big is that part compared to the whole?"; "the team is a unit"
• S: (n) object, physical object (a tangible and visible entity; an entity that can cast a shadow) "it was full of rackets, balls and other objects"
• S: (n) physical entity (an entity that has physical existence)
• S: (n) entity (that which is perceived or known or inferred to have its own distinct existence (living or nonliving))
• part holonym

Verb

• S: (v) log (enter into a log, as on ships and planes)
• S: (v) log, lumber (cut lumber, as in woods and forests)