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English definition of “logarithm”

logarithm

noun [C]     /ˈlɒɡ.ə.rɪ.ðəm/ US  /ˈlɑː.ɡə-/ (informal log)
the number that shows how many times a number, called the base, has to be multiplied by itself to produce another number. Adding or taking away logarithms can replace multiplying or dividing large numbers.Numbers generally logarithmic     /ˌlɒɡ.ərˈɪð.mɪk/ US  /ˌlɑː.ɡəˈrɪð-/ adjective Numbers generally logarithmically     /ˌlɒɡ.ərˈɪð.mɪ.kəl.i/ US  /ˌlɑː.ɡəˈrɪð-/ adverb Numbers generally
(Definition of logarithm noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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