amplitude

am·pli·tude

noun \ˈam-plə-ˌt(y)üd\

Definition of AMPLITUDE

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