The definition of wake-up is a service where guests are awakened by a phone call at a time specified by the guest.(adjective)
An example of wake-up used as an adjective is in the phrase "wake-up call," which is a call to a guest's room at a hotel to get him or her up in the morning.
Wake up is defined as to stop sleeping or to cause someone to stop sleeping.(verb)
An example of wake up is to get out of bed at 6 a.m.
See wake-up in Webster's New World College Dictionary
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