wake-up call

US /ˈweɪk.ʌp ˌkɑːl/
UK /ˈweɪk.ʌp ˌkɑːl/
"wake-up call" picture
1.

a phone call made to wake someone up at a specific time, typically in a hotel

:
I requested a wake-up call for 6 AM.
Did you get your wake-up call this morning?
2.

an event or situation that causes people to realize that they need to change their behavior or attitude

:
The recent economic crisis was a real wake-up call for many businesses.
His doctor's warning about his health was a much-needed wake-up call.