# Dictionary Definition

magnitude

### Noun

1 the property of relative size or extent; "they
tried to predict the magnitude of the explosion"

2 a number assigned to the ratio of two
quantities; two quantities are of the same order of magnitude if
one is less than 10 times as large as the other; the number of
magnitudes that the quantities differ is specified to within a
power of 10 [syn: order of
magnitude]

3 relative importance; "a problem of the first
magnitude"

# User Contributed Dictionary

## English

### Pronunciation

- /mægnɪtjuːd/

### Noun

- The absolute or relative size, extent or importance of something.
- A number, assigned to something, such that it may be compared to others numerically
- Of a vector, the norm, most commonly, the two-norm.
- The apparent brightness of a star (on a negative, logarithmic scale); apparent magnitude
- A measure of the energy released by an earthquake (e.g. on the Richter scale).

#### See also

#### Translations

size etc

number

of a vector

apparent brighness of a star

- Finnish: magnitudi, suuruusluokka, kirkkausaste
- Italian: magnitudine
- Japanese: 等級 (tōkyū)
- Portuguese: grandeza
- Swedish: skenbar magnitud

energy of earthquake

# Extensive Definition

Magnitude may refer to: magnitude scale which
helps people measure such earthquakes, tsunami and even volcanos

- Magnitude (mathematics), a measure of the size of a mathematical object:

- A logarithmic measure of the brightness of an astronomical object:
- Ancient magnitude system
- Modern
magnitude system
- Apparent
magnitude
- Apparent Photographic magnitude (Symbol mpg)
- Apparent Photovisual magnitude (Symbol mpv)
- Apparent Bolometric magnitude (Symbol mb)

- Absolute
magnitude
- Absolute Photographic magnitude (Symbol Mpg)
- Absolute Photovisual magnitude (Symbol Mpv)
- Absolute Bolometric magnitude (Symbol Mb)

- Apparent
magnitude

- Magnitude of an eclipse

- Either of two measures of earthquake strength:
- Richter magnitude scale (including the surface-wave Ms and body wave Mb magnitudes)
- Moment magnitude scale

magnitude in Catalan: Magnitud

magnitude in German: Magnitude

magnitude in Spanish: Magnitud

magnitude in French: Magnitude

magnitude in Italian: Magnitudine

magnitude in Lithuanian: Magnitudė

magnitude in Japanese: マグニテュード (曖昧さ回避)

magnitude in Low German: Magnitude

magnitude in Portuguese: Magnitude

magnitude in Sicilian: Magnitùdini

magnitude in Simple English: Magnitude

magnitude in Slovenian: Magnituda

magnitude in Finnish: Magnitudi

# Synonyms, Antonyms and Related Words

Beehive, Cepheid variable,
Hertzsprung-Russell diagram, Hyades, Messier catalog, NGC, Pleiades, Seven Sisters,
absolute magnitude, amount, ampleness, amplitude, area, bigness, binary star, black
hole, body, boundlessness, breadth, bulk, caliber, consequence, coverage, depth, diameter, dimension, dimensions, double star,
dwarf star, enormity,
enormousness,
expanse, expansion, extension, extent, fixed star, force, formidableness, fullness, gauge, giant star, gigantism, girth, globular cluster, grandeur, grandness, gravity star, great
scope, greatness,
height, hugeness, immensity, import, importance, infinity, intensity, largeness, length, main sequence star,
mass, mass-luminosity law,
matter, measure, measurement, might, mightiness, moment, momentousness, muchness, neighborhood, neutron star,
note, nova, numbers, open cluster, order, pith, plenitude, populations, power, prodigiousness, proportion, proportions, pulsar, quantity, quantum, quasar, quasi-stellar radio
source, radio star, radius, range, reach, red giant star, relative
magnitude, scale, scope, significance, signification, size, sky atlas,
spectrum-luminosity diagram, spread, star, star catalog, star chart,
star cloud, star cluster, stellar magnitude, strength, stupendousness, substance, sum, supernova, tour de force,
tremendousness,
tune, variable star,
vastness, vicinity, volume, weight, weightiness, white dwarf
star, whole, width