ログ Common word LinksSentence search for ログEdit in JMdict Noun1. logComputingNoun2. log; logarithmMathematics, Abbreviation, See also ロガリズムNoun3. log (tree trunk or branch)Noun4. logbook (of a ship or aircraft)Noun5. log (device for measuring the speed of a ship)Wikipedia definition6. Log Discussions Log in to talk about this word.