1. wake-up call - Noun
2. wake-up call - Phrase
A telephone call to awaken someone at a certain time, especially one requested by the person while staying at a hotel.
She requested a five a.m. wake-up call from the front desk.
(figuratively) An alert, reminder, or call to action caused by a dramatic event.
The recent deaths should serve as a wake-up call to others at risk.
wake up call