Definition of certifiable adjective from the Oxford Advanced American Dictionary

     

    certifiable

     adjective
    adjective
    NAmE//ˌsərt̮əˈfaɪəbl//
     
     
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  1. 1a person who is certifiable can or should be officially stated to be insane (informal) He's certifiable (= he's crazy).
  2. 2 good enough to be officially accepted or recommended
  3. 3 clearly true or genuine There is little hope for certifiable progress in the stalemate.
certifiably
 
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NAmE//ˌsərt̮əˈfaɪəbli//
 
adverb certifiably insane
See the Oxford Advanced Learner's Dictionary entry: certifiable