1N-COUNT [usually singular](旅馆等提供的)叫醒电话,叫醒服务 A wake-up call is a telephone call that you can book through an operator or at a hotel to make sure that you wake up at a particular time. (旅馆等提供的)叫醒电话,叫醒服务
2N-COUNT [usually singular]警钟;警示 If you say that something is a wake-up call to a person or group of people, you mean that it will make them notice something and start to take action. 警钟;警示
The Ambassador said he hoped the statement would serve as a wake-up call to the government. [+ to]