Pronunciation: (wāk'up"),[key] —n. 1. an act or instance of waking up.
2. an act or instance of being awakened: I asked the hotel desk for a wake-up at 6. 3. a time of awaking or being awakened: I'll need a 5 o'clock wake-up to make the early plane. 4. flicker2.
—adj. 1. serving to wake one from sleep: Leave a wake-up call at the front desk. 2. serving to arouse or excite: a wake-up call on the problems of pollution.