Meaning of AMPLITUDE in English

n. 1 a Physics the maximum extent of a vibration or oscillation from the position of equilibrium. b Electr. the maximum departure of the value of an alternating current or wave from the average value. 2 a spaciousness, breadth; wide range. b abundance. amplitude modulation Electr. 1 the modulation of a wave by variation of its amplitude. 2 the system using such modulation.

[ F amplitude or L amplitudo (as AMPLE) ]

Concise Oxford English dictionary.      Краткий оксфордский словарь английского языка.