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# amplitude

[ **am**-pli-tood, -tyood ]

## noun

- the state or quality of being ample, especially as to breadth or width; largeness; greatness of extent.
- large or full measure; abundance; copiousness.
- mental range, scope, or capacity.
*Physics.*the absolute value of the maximum displacement from a zero value during one period of an oscillation.*Electricity.*the maximum deviation of an alternating current from its average value.*Astronomy.*the arc of the horizon measured from the east or west point to the point where a vertical circle through a heavenly body would intersect the horizon.*Mathematics.*argument ( def 8b ).

amplitude

/ ˈæmplɪˌtjuːd /

## noun

- greatness of extent; magnitude
- abundance or copiousness
- breadth or scope, as of the mind
- astronomy the angular distance along the horizon measured from true east or west to the point of intersection of the vertical circle passing through a celestial body
- See modulus, Argand diagramAlso calledargument maths (of a complex number) the angle that the vector representing the complex number makes with the positive real axis. If the point (
*x, y*) has polar coordinates (*r, θ*), the amplitude of*x*+ i*y*is*θ*, that is, arctan*y/x*Compare modulus See also Argand diagram - physics the maximum variation from the zero or mean value of a periodically varying quantity

amplitude

/ ăm**′**plĭ-to̅o̅d′ /

*Physics.*One half the full extent of a vibration, oscillation, or wave. The amplitude of an ocean wave is the maximum height of the wave crest above the level of calm water, or the maximum depth of the wave trough below the level of calm water. The amplitude of a pendulum swinging through an angle of 90° is 45°.*Physics.*Compare frequency*Electronics.*The amount by which a voltage or current changes from zero or an average value.

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## Word History and Origins

Origin of amplitude^{1}

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## Word History and Origins

Origin of amplitude^{1}

*amplitūdō*breadth, from

*amplus*spacious

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## Example Sentences

The amplituhedron is a simpler way of calculating amplitudes.

“We build a shape, and the volume of the shape gives me an amplitude,” said Arkani-Hamed.

The somewhat clunky prevailing method for calculating amplitudes is something called a Feynman diagram, named for its inventor, Richard Feynman.

Instead, they’re described by an amplitude, which is like a probability that the collision plays out in a given way.

They’ve also shown that three-point amplitudes serve as the building blocks of four- and higher-point amplitudes involving more and more particles.

Fairly or not, many people see that kind of amplitude of girth as a sign of irresponsibility or lack of discipline or something.

And Romney spoke at a lower pitch and used more tonal amplitude.

The proof is wrought out in detail, with great amplitude of evidence, acuteness of argument, and to an irresistible conclusion.

The intensity of any light depends upon the amplitude of the corresponding vibration, and its color depends upon the wave length.

Their historic lore and unequaled grandeur give them amplitude and poetry enough to kindle and enrich the imagination.

The amplitude of a star is its distance from the prime vertical, measured on the horizon, north or south.

The difference is due to the greater amplitude of vibration caused by more energy being used.

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