Amplitude meaning

ămplĭ-to͝od, -tyo͝od
Frequency:
The definition of amplitude refers to the length and width of waves, such as sound waves, as they move or vibrate.

How much a radio wave moves back and forth is an example of its amplitude.

noun
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Greatness of size; magnitude.
noun
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The extreme range of a fluctuating quantity, as an alternating current or the swing of a pendulum, generally measured from the average or mean to the extreme.
noun
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Scope or breadth, as of mind.
noun
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(astronomy) The angular distance along the horizon from true east or west to the intersection of the vertical circle of a celestial body with the horizon.
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(physics) The maximum absolute value of a periodically varying quantity.
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Fullness; copiousness.
noun
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(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°.
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Breadth or range, as of intelligence.
noun
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(electronics) The maximum absolute value reached by a voltage or current waveform.
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The strength or volume of a signal, usually measured in decibels. See wavelength.
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The extreme range, or magnitude, of a fluctuating value such as an acoustic or electromagnetic signal, amplitude is measured perpendicular to the to the time axis of a time-plot, i.e., frequency, of a sine wave. Amplitude is a measure of the intensity, loudness, power, strength, or volume level of a signal. In an electrical circuit operating on alternating current (ac), amplitude is measured as the Voltage (V) level and is expressed as +V and V, depending on the direction of the current. See also sine wave.
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The measure of something's size, especially in terms of width or breadth; largeness, magnitude.
noun
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(mathematics) The maximum absolute value of the vertical component of a curve or function, especially one that is periodic.
noun
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(physics) The maximum absolute value of some quantity that varies.
noun
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The quality of being ample or the amount or degree to which a thing extends.
noun
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An amount that is more than enough; abundance; fullness.
noun
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The angular distance of a star from the true east or west point of the horizon, at the moment of its rising or setting.
noun
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(electronics) The amount by which a voltage or current changes from zero or an average value.
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Origin of amplitude

  • Latin amplitūdō from amplus large

    From American Heritage Dictionary of the English Language, 5th Edition

  • Middle French amplitude, from Latin amplitudo, from amplus (“large”); see ample and -itude.

    From Wiktionary