wavelength
US /ˈweɪv.leŋθ/
UK /ˈweɪv.leŋθ/

1.
the distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.
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The color red has a longer wavelength than blue.
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Different radio stations broadcast on different wavelengths.
2.
a person's way of thinking or feeling, especially as it affects their ability to communicate with others.
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We're on the same wavelength when it comes to business strategy.
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It's hard to work with him because we're not on the same wavelength.