wave‧length /ˈweɪvleŋθ/ noun [countable]

1. the size of a radio wave used to broadcast a radio signal

2. 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.

[TahlilGaran] Dictionary of Contemporary English ▲

wavelength
noun
ADJ. long, medium, short | infrared, ultraviolet | visible | acoustic, radio
VERB + WAVELENGTH tune in to
PREP. on a/the ~ Radio One has broadcast on this wavelength for years.

[TahlilGaran] Collocations Dictionary ▲