Definitions:

1. Refers to the degree to which something seems reasonable, likely, or possible given the context, facts, or circumstances. NOUN
   • The detective found the suspect's alibi to be lacking in plausibility and decided to investigate further.
2. Something is likely to be true, or has the appearance of truth or reason. NOUN
   • The author's novel was praised for its realism and the plausibility of its characters and plot.
3. The quality of being believable or credible based on evidence, logic, or common sense. NOUN
   • The scientist's theory gained widespread acceptance due to its plausibility and the supporting evidence gathered through experimentation.

Synonyms:

• authenticity
• believability
• credence
• credibility
• likelihood
• likeliness
• possibility
• Probability
• reliability
• validity
• validness