/ˈhedset ||; ˈhɛdˌsɛt/noun [C] a piece of equipment that you wear on your head that includes a device for listening (headphones) and/or a device for speaking into(a microphone) 头戴式受话器（包括耳机和╱或话筒）: The pilot was talking into his headset. 飞行员对着头戴式受话器说话。