natural logarithm natural law • natural number · · · Info · Definitions · Synonyms · Characters · · natural logarithm · · Text Common · · Latin · · Scripts 17 · · Length 6 · · Syllables Definitions · · · (noun) a logarithm to the base e. Synonyms: natural logarithm, Napierian logarithm. · · Noun Definition 1 Synonyms · · · napierian logarithm · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 g latin small letter g U+0067 h latin small letter h U+0068 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075