1. the distance between two consecutive peaks or troughs of a wave, especially in physics
Usage: physics; technical
2. a person’s way of thinking or attitude, especially when shared with others
Usage: informal

Examples

• Red light has a longer wavelength than blue light.
• The radio station broadcasts on a wavelength of 101.5 FM.
• Scientists measured the wavelength of the sound waves.
• We’re on the same wavelength about this project.
• I can’t seem to get on her wavelength.
• The teacher and students were on different wavelengths.
• Infrared radiation has wavelengths longer than visible light.