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

 

punctiliousness

 noun
noun
BrE BrE//pʌŋkˈtɪliəsnəs//
 
; NAmE NAmE//pʌŋkˈtɪliəsnəs//
 
[uncountable](formal)
 
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behaviour that is very careful and correct so that you perform your duties exactly as you should