# Magnitude vs Amplitude - What's the difference?

magnitude | amplitude |

## As nouns the difference between magnitude and amplitude

is that magnitude is (uncountable|countable) the absolute or relative size, extent or importance of something while amplitude is the measure of something's size, especially in terms of width or breadth; largeness, magnitude.

# magnitude

## English

### Noun

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

* order of magnitude * absolute magnitude * apparent magnitude

# amplitude

## English

(wikipedia amplitude)

### Noun

(en noun)
• The measure of something's size, especially in terms of width or breadth; largeness, magnitude.
• * Fuller
• The cathedral of Lincoln is a magnificent structure, proportionable to the amplitude of the diocese.
• * Milton
• amplitude of mind
• * Macaulay
• amplitude of comprehension
• (mathematics) The maximum absolute value of the vertical component of a curve or function, especially one that is periodic.
• (physics) The maximum absolute value of some quantity that varies.
• (astronomy) The arc of the horizon between the true east or west point and the center of the sun, or a star, at its rising or setting. At the rising, the amplitude is eastern or ortive: at the setting, it is western, occiduous, or occasive. It is also northern or southern, when north or south of the equator.
• (astronomy) The arc of the horizon between the true east or west point and the foot of the vertical circle passing through any star or object.
• (firearms) The horizontal line which measures the distance to which a projectile is thrown; the range.