English Dictionary

Definition of “magnitude

magnitude (ˈmæɡnɪˌtjuːdPronunciation for magnitude

Definitions

noun

  1. relative importance or significance  ⇒ a problem of the first magnitude 
  2. relative size or extent  ⇒ the magnitude of the explosion 
  3. mathematics a number assigned to a quantity, such as weight, and used as a basis of comparison for the measurement of similar quantities
  4. apparent magnitudeastronomy the apparent brightness of a celestial body expressed on a numerical scale on which bright stars have a low value. Values are measured by eye (visual magnitude) or more accurately by photometric or photographic methods, and range from –26.7 (the sun), through 1.5 (Sirius), down to about +30. Each integral value represents a brightness 2.512 times greater than the next highest integral value See also absolute magnitude , visual magnitude
  5. earthquake magnitudegeology a measure of the size of an earthquake based on the quantity of energy released: specified on the Richter scale See Richter scale

Alternative Forms

ˌmagniˈtudinous adjective

Word Origin

C14: from Latin magnitūdō  size, from magnus great

Usage examples

  • At least he'd let her buy him something to eat (a sacrifice of some considerable magnitude on his part, apparently).
    Nicola Barker, BEHINDLINGS (2002)
  • Then, at 2100 GMT on Wednesday, a second flare occurred of almost equal magnitude.
    New Scientist (2003)
  • To have a platform, a voice, a position or a place within the huge magnitude of the whole thing.
    Globe and Mail (2003)
  • She said: "We cannot afford to allow something of this magnitude to misfire.
    Sun, News of the World (2001)
  • Venus can reach a maximum magnitude of 4.7, nearly seven times brighter than the next most prominent planet, Jupiter.
    Ridpath, Ian & Tirion, Will, Stars and Planets (1993)

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