[countable, usually singular] a sudden shock or event that causes a change in the price, value, etc. of sth（导致价格、价值变化的）冲击，突发事件◆News of falling sales delivered a nasty jolt to the company's share price.销量下降的消息给公司的股价带来严重的冲击。◆The tax cuts will give the economy a much-needed jolt.减税将给经济带来非常必要的刺激。