wake–up call noun
plural ∼ calls [count] 1 : a telephone call that a hotel makes to your room to wake you up 2 : something that makes you fully understand a problem, danger, or need
▪ His diagnosis of cancer was a wake-up call to all of us about the dangers of smoking.
▪ His diagnosis of cancer was a wake-up call to all of us about the dangers of smoking.
