If you overpower someone, you manage to take hold of and keep hold of them, although they struggle a lot.

If a feeling overpowers you, it suddenly affects you very strongly.

In a sports match, when one team or player overpowers the other, they play much better than them and beat them easily.

If something such as a colour or flavour overpowers another colour or flavour, it is so strong that it makes the second one less noticeable.