1. the exponent to which a base number must be raised to produce a given number
Usage: mathematics; commonly abbreviated as 'log'

Examples

• The logarithm of 100 to the base 10 is 2, because 10² = 100.
• Scientists use logarithms to work with very large numbers in astronomy and chemistry.
• On a logarithmic scale, each step represents a tenfold increase.
• To solve the equation 2^x = 8, you can take the logarithm of both sides.
• Natural logarithms, written as ln, use the mathematical constant e as their base.
• Logarithms are the inverse operation of exponentiation.