Definition of nightwatchman noun from the Oxford Advanced Learner's Dictionary

 

nightwatchman

 noun
noun
BrE BrE//naɪtˈwɒtʃmən//
 
; NAmE NAmE//naɪtˈwɑːtʃmən//
 
(pl. nightwatchmen
BrE BrE//naɪtˈwɒtʃmən//
 
; NAmE NAmE//naɪtˈwɑːtʃmən//
 
)
 
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a man whose job is to guard a building such as a factory at night