American English

Definition of demonstrable adjective from the Oxford Advanced American Dictionary

  

demonstrable

 adjective
adjective
NAmE//dɪˈmɑnstrəbl//
 
(formal)
 
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that can be shown or proved a demonstrable need There is no demonstrable link between the two events.
 demonstrably
 
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NAmE//dɪˈmɑnstrəbli//
 
adverb demonstrably unfair
See the Oxford Advanced Learner's Dictionary entry: demonstrable