tick When a clock or watch ticks, it makes a sound every second. （钟表）发出嘀嗒声 The ticking of the clock kept her awake. 钟的滴答上让她睡不着觉。 The only sound in the room was the loud ticking of the clock on the mantelpiece. 房间里唯一的声音是壁炉台上的时钟发出的巨大滴答声。