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

 

impulsiveness

 noun
noun
BrE BrE//ɪmˈpʌlsɪvnəs//
 
; NAmE NAmE//ɪmˈpʌlsɪvnəs//
 
[uncountable]
 
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the tendency to act suddenly without thinking carefully about what might happen because of what you are doing synonym impetuosity, rashness