noun
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physicsa disturbance that travels through space and matter in a regular, oscillating pattern.
A wave is a disturbance that travels through space and matter in a regular, oscillating pattern. Waves can manifest as physical waves (sound waves, water waves) or electromagnetic waves (light waves, radio waves).
In mathematics, a wave is often conceptualized as a periodic oscillation and can be represented by various functions, most commonly the sine and cosine functions.