rev·eil·le
noun/rɪˈvæli/
/ˈrevəli/
[uncountable]- a tune that is played to wake soldiers in the morning; the time when it is played
（军队的）起床号，起床时间 - Reveille sounded at first light.
天一亮，起床号就拉响了。
Word Originmid 17th cent.: from French réveillez! ‘wake up!’, imperative plural of réveiller, based on Latin vigilare ‘keep watch’. - Reveille sounded at first light.