Definition of categorical adjective from the Oxford Advanced Learner's Dictionary

 

categorical

 adjective
adjective
BrE BrE//ˌkætəˈɡɒrɪkl//
 
; NAmE NAmE//ˌkætəˈɡɔːrɪkl//
 
[usually before noun](formal)
 
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expressed clearly and in a way that shows that you are very sure about what you are saying to make a categorical statement to give a categorical assurance They gave him a categorical assurance that he would not be hurt. Word Origin late 16th cent.: from late Latin categoricus (from Greek katēgorikos, from katēgoria ‘statement’, from katēgoros ‘accuser’) + -al.
See the Oxford Advanced American Dictionary entry: categorical