Definition of believability in English:

believability

noun

mass noun
  • 1The quality of being able to be believed; credibility.

    ‘the Internet is overflowing with various conspiracy theories with extremely disparate levels of believability’
    ‘editors have an obligation to provide readers with the information needed to judge the believability of articles they read’
    1. 1.1(with reference to a fictional character or situation) the quality of being convincing or realistic.
      ‘the plot lacks believability at certain key moments’
      ‘it builds the believability of a character when the actor dresses the part’

Pronunciation

believability

/bɪˌliːvəˈbɪlɪti/