A logarithm, A bulky piece or stick of unhewn timber; a length of wood as cut from the trunk or a large limb of a tree; specifically, an unsplit stick of timber with butted ends ready for sawing, Hence The record of a ship's progress, or a tabulated summary of the performance of the engines and boilers, etc; a log-book, intransitive verb_ To enter in a record, as of a ship or an aircraft, To travel (a specified distance, time, or speed), transitive verb_ To record any event in a logbook, especially an event relating to the operation of a machine or device, (Naut) To enter in a ship's log book