Longman Dictionary of Contemporary English homepage

wavelength

 noun
     
Related topics: Physics, Broadcasting, Power
wave‧length [countable]
1TCBHP the size of a radio wave used to broadcast a radio signal
2TPHP technical the distance between two points on energy waves such as sound or light
3

be on the same/a different wavelength

informal to have the same or different opinions and feelings as someone else:
Dad is just on a different wavelength from me.
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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