1. A usually large section of a trunk or limb of a fallen or felled tree. 2. A long, thick section of trimmed, unhewn timber. 3. A device trailed from a ship to determine its speed through the water. 4. A record of a ship's speed, its progress, and any shipboard events of navigational importance. 5. The book in which this record is kept. 6. A record of a vehicle's performance, as the flight record of an aircraft. 7. a computer log; a trip log. 8. To cut down, trim, and haul the timber of (a piece of land). 9. To cut (timber) into unhewn sections. 10. To enter in a record, as of a ship or an aircraft. 11. logged 30,000 air miles in April. 12. had logged 25 years with the company. 13. To cut down, trim, and haul timber. 14. To enter into a computer the information required to begin a session. 15. To enter into a computer the command to end a session.
