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

 

deductive

 adjective
adjective
BrE BrE//dɪˈdʌktɪv//
 
; NAmE NAmE//dɪˈdʌktɪv//
 
[usually before noun]
 
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using knowledge about things that are generally true in order to think about and understand particular situations or problems deductive logic/reasoning compare inductive Word Origin mid 17th cent.: from medieval Latin deductivus, from deduct- ‘deduced’, from the verb deducere, from de- ‘down’ + ducere ‘lead’.
See the Oxford Advanced American Dictionary entry: deductive