1. to set the controls of a piece of electrical equipment so that it will start to work at a particular time
   • preset something to do something
     ● You can preset the radiators to come on when you need them to.
   • preset something
     ● to preset TV channels/radio stations (= to set the controls so that particular channels are selected when you press particular buttons)
2. [usually passive] preset something to decide something in advance
   • ● They kept to the preset route.

[TahlilGaran] English Dictionary ▲