simple past tense and past participle of log on

(mathematics) Describing a relationship (or a graph) between logarithmic quantities (or scales)

(computing) To gain access to a computer system, usually by providing a previously agreed upon username and password.

The trunk of a dead tree, cleared of branches. / Any bulky piece as cut from the above, used as timber, fuel etc.

(transitive) To cut trees into logs. / (transitive) To cut down (trees). / (intransitive) To cut down trees in an area, harvesting and transporting the logs as wood.

A logbook, or journal of a vessel's (or aircraft's) progress. / A chronological record of actions, performances, computer/network usage, etc.

(transitive) To make, to add an entry (or more) in a log or logbook. / (transitive) To travel (a distance) as shown in a logbook.

(obsolete) To move to and fro; to rock.

(historical units of measure) A Hebrew unit of liquid volume (about ¹⁄₃ liter).

Synonym of logarithm. / (sciences) A difference of one in the logarithm, usually in base 10; an order of magnitude.