# Definition of 'logarithm'

countable noun

In mathematics, the logarithm of a number is a number that it can be represented by in order to make a difficult multiplication or division sum simpler.

COBUILD Advanced English Dictionary. Copyright © HarperCollins Publishers

noun

the exponent indicating the power to which a fixed number, the base, must be raised to obtain a given number or variable. It is used esp to simplify multiplication and division: if ax = M, then the logarithm of M to the base a (written logaM) is x

Often shortened to: log. See also common logarithm, natural logarithm Collins English Dictionary. Copyright © HarperCollins Publishers

Word origin of 'logarithm'

noun

Ancient Mathematics

the exponent expressing the power to which a fixed number (the base) must be raised in order to produce a given number (the antilogarithm): logarithms computed to the base 10 are often used for shortening mathematical calculations

Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by
Houghton Mifflin Harcourt. All rights reserved.

Derived forms

adjective

logarithmically (ˌlogaˈrithmically)

adverb

Word origin of 'logarithm'

## Example sentences containing 'logarithm'

These examples have been automatically selected and may contain sensitive content.
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Logarithms made sense when electronic calculators were as big as shipping containers. Times, Sunday Times (2011)The notes on the keyboard get closer together according to the difference between the sequence of the logarithms of natural numbers. Times, Sunday Times (2008)A book of logarithms is arranged rather like a dictionary. Times, Sunday Times (2008)It is easy to get lost in the figures and horrible memories of schoolday logarithms, but here is some context. Times, Sunday Times (2015)

## Trends of 'logarithm'

Used Occasionally. logarithm is one of the 30000 most commonly used words in the Collins dictionary

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## Nearby words of 'logarithm'

## Related Terms of 'logarithm'

## Source

Definition of

**logarithm**from the Collins English DictionaryCollins Dictionaries for Schools

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