a short, high-pitched sound emitted by electronic equipment or a vehicle horn (电子装置或汽车喇叭发出的)嘟声
verb
[noobj.](of a horn or electronic device) produce such a sound (喇叭或电子装置)发出嘟声 ■[with obj.](chiefly N. Amer.)summon (someone) by means of a pager (主 北美)用传呼机召唤,呼(某人)