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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, (def 8b).
Contemporary Examples

Fairly or not, many people see that kind of amplitude of girth as a sign of irresponsibility or lack of discipline or something.
The Christie Girth Michael Tomasky December 13, 2012

Historical Examples

The amplitude is the width of swing of the individual particles of the waves.
Fragments of science, V. 1-2 John Tyndall

The one is marked by energy and accuracy, the other by amplitude.
Pascal John Tulloch

Each seat holds two persons, but with some difficulty if either has any amplitude of bulk.
The Land of Contrasts James Fullarton Muirhead

Factors affecting intensity: area, amplitude, density, distance.
Physics Willis Eugene Tower

Their historic lore and unequaled grandeur give them amplitude and poetry enough to kindle and enrich the imagination.
Your National Parks Enos A. Mills

Varying the amplitude of oscillations by means of the voice.
The Radio Amateur’s Hand Book A. Frederick Collins

This is called the amplitude and is indicated by the distance A-b.
Physics Willis Eugene Tower

As yet the completeness and amplitude of the disaster had not reached him.
The Pace That Kills Edgar Saltus

The amplitude of response was not only diminished, but the recovery also was incomplete.
Life Movements in Plants Sir Jagadis Chunder Bose

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
(maths) Also called argument. (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 + iy is θ, that is, arctan y/x Compare modulus (sense 2) See also Argand diagram
(physics) the maximum variation from the zero or mean value of a periodically varying quantity

1540s, from Middle French amplitude or directly from Latin amplitudinem (nominative amplitudo) “wide extent, width,” from amplus (see ample). Amplitude modulation in reference to radio wave broadcast (as opposed to frequency modulation) first attested 1921, usually abbreviated a.m.

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°. Compare frequency.

Electronics The amount by which a voltage or current changes from zero or an average value.

In physics, the height of a crest (or the depth of a trough) of a wave.


Read Also:

  • Amplitude modulation

    . noun one of the principal methods of transmitting audio, visual, or other types of information using radio waves, the relevant signal being superimposed onto a radio-frequency carrier wave. The frequency of the carrier wave remains unchanged but its amplitude is varied in accordance with the amplitude of the input signal Abbreviation AM, am Compare […]

  • Amphitricha

    plural noun bacteria that have flagella at both ends

  • Amphithyron

    (def 1).

  • Ampoule

    a sealed glass or plastic bulb containing solutions for hypodermic injection. Historical Examples They met together one night in the Duke of ampoule’s country house, six miles eastward of Alca, to consider ways and means. Penguin Island Anatole France After cleaning a spot on her arm, he dug out a needle, and filled it from […]

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