/ˌpri:ˈset ||; ˌpriˈsɛt/(also pre-set) verb [T] (present participle presetting; past tense, past participle preset) to set the controls of a piece of electrical equipment so that it will start to work at a particular time 预先设置；预调: to preset TV channels/radio stations (= to set the controls so that particular channels are selected when you press particular buttons)预调电视频道/广播电台 The water is heated to a preset temperature. 水温加热至默认温度。➔preset noun [C]