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

 

assiduity

 noun
noun
BrE BrE//ˌæsɪˈdjuːəti//
 
; NAmE NAmE//ˌæsɪˈdjuːəti//
 
[uncountable](formal)
 
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the quality of working very hard and taking great care that everything is done as well as it can be