This is the 3554th most frequent Dutch word.
overgaan
"Overgaan" means "to pass," "to transition," or "to proceed."
In this sentence, 'overgaan' refers to the ringing of the school bell, signaling the transition to the next period or event.
De bel gaat over na het laatste lesuur.
The bell rings at the end of the last class hour.
Here, 'overgaan' is used in the sense of moving on to a higher academic year upon having sufficient grades.
Je moet harder studeren als je wilt overgaan naar de volgende klas.
You need to study harder if you want to pass to the next class.
In this case, 'overgaan' indicates that something, like noise or a phenomenon, will diminish or cease after some time.