adj.
 able to be believed; convincing.
Derivative
  
  Usage
  People sometimes confuse the words credible and creditable. Credible chiefly means ‘able to be believed; convincing’ (few people found his story credible), while creditable means ‘deserving acknowledgement and praise but not necessarily outstanding’ (a very creditable 2–4 defeat).
  Etymology
  ME: from L. credibilis, from credere ‘believe’.