Definition of plausible adjective from the Oxford Advanced American Dictionary

     

    plausible

     adjective
    adjective
    NAmE//ˈplɔzəbl//
     
     
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  1. 1(of an excuse or explanation) reasonable and likely to be true Her story sounded perfectly plausible. The only plausible explanation is that he forgot. opposite implausible
  2. 2(disapproving) (of a person) good at sounding honest and sincere, especially when trying to trick people She was a plausible liar.
plausibility
 
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NAmE//ˌplɔzəˈbɪlət̮i//
 
noun [uncountable] This new evidence lends plausibility to the theory that she was murdered.
NAmE//ˈplɔzəbli//
 
adverb He argued very plausibly that the claims were true.
See the Oxford Advanced Learner's Dictionary entry: plausible