Definitions for wake-up call
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Princeton's WordNet
wake-up call(noun)
a warning to take action concerning something that was overlooked or neglected
"the bombing was a wake-up call to strengthen domestic security"
wake-up call(noun)
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."
Wiktionary
wake-up call(Noun)
A telephone call to awaken someone at a certain time, especially one requested by the person while staying at a hotel.
wake-up call(Noun)
An alert, reminder, or call to action caused by a dramatic event.
Origin: wake-up + call
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