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

  

conclusive

 adjective
adjective
BrE BrE//kənˈkluːsɪv//
 
; NAmE NAmE//kənˈkluːsɪv//
 
 
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proving something, and allowing no doubt or confusion conclusive evidence/proof/results The evidence is by no means conclusive. opposite inconclusive Word Origin late 16th cent. (in the sense ‘summing up’): from late Latin conclusivus, from Latin conclus- ‘closed up’, from the verb concludere, from con- ‘completely’ + claudere ‘to shut’.Extra examples They produced some fairly conclusive evidence. In the absence of any conclusive proof against the man, charges will not be brought. It’s difficult to get conclusive evidence of the existence of black holes in space. Studies of gender differences in learning are far from conclusive. The results of the test were not conclusive.
See the Oxford Advanced American Dictionary entry: conclusive