Log (noun)

1. A large, roughly cylindrical piece of wood or tree trunk.
2. A record of a voyage or flight, typically made in a ship's or aircraft's logbook.
3. A record of operating or performance data, especially of a computer system.

Origin:

Middle english (denoting a tree trunk or block of wood): of scandinavian origin; related to swedish dial. låg and norwegian dialect logg, based on old norse lág "fallen tree".

Examples:

1. They gathered firewood, including large logs for the fireplace.
2. He kept a log of his daily activities in a small journal.
3. The system administrator checks the error logs on a regular basis.
4. She checked the log to see if the payment had been processed.
5. The logs floated down the river after being cut from the banks.