Origin: Latin suffix -ude
Amplitude has 4 different meanings across 1 category:
(physics) the maximum displacement of a periodic wave
"The amplitude of the sound wave determines how loud it appears to be."
the property of copious abundance
"The amplitude of his laughter filled the entire room, creating an atmosphere of pure joyous abundance."
greatness of magnitude
"The speaker's amplitude was so great that she could be heard by everyone in the stadium without a microphone."
The measure of something's size, especially in terms of width or breadth; largeness, magnitude.
"The amplitude of his gestures captured the audience's attention during his passionate speech."
In plain English: Amplitude is how far something moves away from its resting position before coming back again.
"The amplitude of the radio waves determines how loud the sound will be when they reach your speakers."
Usage: Amplitude specifically refers to the maximum extent of vibration or oscillation measured from the center line, making it distinct from general "magnitude" which applies to any large quantity. Use this term primarily when describing waves, sound levels, or pendulum motion rather than abstract concepts like importance or size.
The word amplitude entered English through Middle French, where it was borrowed directly from the Latin term amplitūdō. This Latin root comes from amplus, meaning "large," and originally described something with great width or extent.