noun mag·ni·tude \ˈmag-nə-ˌtüd, -ˌtyüd\

: the size, extent, or importance of something

: a number that shows the brightness of a star

: a number that shows the power of an earthquake

Full Definition of MAGNITUDE

a :  great size or extent
b (1) :  spatial quality :  size
(2) :  quantity, number
:  the importance, quality, or caliber of something
:  a number representing the intrinsic or apparent brightness of a celestial body on a logarithmic scale in which an increase of one unit corresponds to a reduction in the brightness of light by a factor of 2.512
:  a numerical quantitative measure expressed usually as a multiple of a standard unit
:  the intensity of an earthquake represented by a number on an arbitrary scale <a magnitude six earthquake>

Examples of MAGNITUDE

  1. <the magnitude of the issue can scarcely be overstated>
  2. <the mountain's sheer magnitude usually leaves tourists speechless>


Middle English, from Anglo-French, from Latin magnitudo, from magnus
First Known Use: 15th century

Other Mathematics and Statistics Terms

abscissa, denominator, divisor, equilateral, exponent, hypotenuse, logarithm, oblique, radii, rhomb
MAGNITUDE Defined for Kids


noun mag·ni·tude \ˈmag-nə-ˌtüd, -ˌtyüd\

Definition of MAGNITUDE for Kids

:  greatness of size or importance <“How can you term an undertaking of such magnitude mere peddling?” — Lloyd Alexander, Time Cat>
Medical Dictionary


noun mag·ni·tude \ˈmag-nə-ˌt(y)üd\

Medical Definition of MAGNITUDE

:  relative size or extent
July 06, 2015
categorical Hear it
absolute or relating to a category
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