/ ˌɒsɪˈleɪʃn; NAmE ˌɑːs-/ noun ( formal ) oscillation (between A and B)
1.
[ U , sing. ] a regular movement between one position and another or between one amount and another :
the oscillation of the compass needle
the economy's continual oscillation between growth and recession
2.
[ C ] a single movement from one position to another of sth that is oscillating :
the oscillations of the pound against foreign currency
3.
[ U , C ] a repeated change between different feelings, types of behaviour or ideas :
his oscillation, as a teenager, between science and art