Main Entry: am·pli·tude

Pronunciation: \ˈam-plə-ˌt(y)üd\

Function: noun

1 : the extent or range of a quality, property, process, or phenomenon: as a : the extent of a vibratory movement (as of a pendulum) measured from the mean position to an extreme b : the maximum departure of the value of an alternating current or wave from the average value