noun Download 🔗Share The length of a single cycle of a wave, as measured by the distance between one peak or trough of a wave and the next; it is often designated in physics as λ, and corresponds to the velocity of the wave divided by its frequency. Examples : "Different colors of light have different wavelengths, with red light having longer wavelengths than blue light. " physics frequency sound energy technical technology Chat with AIVocabulary GamePractice Reading