amplitude
Pronunciation
[change]Noun
[change]![](http://upload.wikimedia.org/wikipedia/commons/thumb/e/e9/Wave.png/350px-Wave.png)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/3/3a/Sinus_amplitude_en.svg/350px-Sinus_amplitude_en.svg.png)
- The measure of how big something is.
- (mathematics) The biggest possible absolute value of the vertical part of a periodic curve.
- (physics) The biggest possible absolute value of something that changes periodically (like a wave).