/ ˌpriːˈset; NAmE / verb ( pre·setting , pre·set , pre·set )
1.
to set the controls of a piece of electrical equipment so that it will start to work at a particular time :
[ vn to inf ]
You can preset the radiators to come on when you need them to.
[ vn ]
to preset TV channels / radio stations (= to set the controls so that particular channels are selected when you press particular buttons)
2.
[ vn ] [ usually passive ] to decide sth in advance :
They kept to the preset route.