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. On fair skin, pale shades are delicate enough not to overpower your colouring. = overwhelm
If a feeling overpowers you, it suddenly affects you very strongly. A sudden dizziness overpowered him = overwhelm
In a sports match, when one team or player overpowers the other, they play much better than them and beat them easily. Britain's tennis No 1 yesterday overpowered American Brian Garrow 7-6, 6-3
To excel or exceed in power; to cause to yield; to vanquish; to subdue; as, the light overpowers the eyes
If you overpower someone, you manage to take hold of and keep hold of them, although they struggle a lot. It took ten guardsmen to overpower him