In physics and signal processing, amplitude is defined as the maximum displacement or intensity of a point or wave measured from its equilibrium or resting position. It quantifies the magnitude of oscillation or the strength of a wave, whether physical, electrical, or acoustic. For example, in wave dynamics, a larger amplitude signifies a greater vertical displacement from the average baseline, indicating higher energy or intensity within the system. In signal analysis, it represents the maximum voltage or measurable deviation from a zero baseline. The concept is fundamental across disciplines, providing a measure of scale that is essential for characterizing the power and reach of periodic functions and natural forces.