wavelength

plural wavelengths

1. natural sciencesThe 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.

   I'd take requests on the telephone / I'm on a wavelength far from home

   1983, Wall of Voodoo, “Mexican Radio”, in Call of the West

2. figurativelyA person's attitude and way of thinking as compared to another person's.

   I think you and I are on a different wavelength.

   1 more example

   And just when you mean to tell her / That you have no love to give her / Then she gets you on her wavelength / And she lets the river answer

   1967, Leonard Cohen, “Suzanne”