wake-up call

Noun	1.	wake-up call - a warning to take action concerning something that was overlooked or neglected; "the bombing was a wake-up call to strengthene domestic security" warning - a message informing of danger
	2.	wake-up call - a telephone call that you request be made a specific time in order to wake you up at that time (especially in hotels); "she left a wake-up call for 7 a.m." call, phone call, telephone call - a telephone connection; "she reported several anonymous calls"; "he placed a phone call to London"; "he heard the phone ringing but didn't want to take the call"

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