REVEILLE

n. signal on a bugle or drum played in the early morning to awaken soldiers; any signal that serves as a wake-up call

Reveille (see also pronunciation differences) is a bugle call most often associated with the military; it is chiefly used to wake military personnel at sunrise. The name comes from the French for "wake up". The tune used in the Commonwealth of Nations is different from the one used in the United States, but they are used in analogous ways: to ceremonially start the day.
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Noun
1. (military) signal to wake up
(synonym) wake-up signal
(hypernym) bugle call
(classification) military, armed forces, armed services, military machine, war machine
2. a signal to get up in the morning; in the military it is a bugle call at sunrise
(hypernym) awakening, wakening, waking up

adj. awake, woken up

v. wake, awaken; arouse, call, rouse

n. reveille, rouse