The magnitude of a wave, especially as a measure of its energy or power.
Late 17th century: from latin amplitudo "largeness", from amplus "large".
- The amplitude of the waves increased as the wind grew stronger.
- In physics, amplitude is a measure of the amount of disturbance in a wave.
- The amplitude of the sound wave was proportional to the volume of the sound.
- The amplitude of the light wave was related to its brightness.
- Amplitude is often represented graphically as the height of a wave from its center line to its peak or trough.