1. the quality or state of being implausible; lack of believability or credibility

Examples

• The implausibility of the witness's story made the jury skeptical.
• Critics pointed out the implausibility of the movie's plot twist.
• Despite the implausibility of his excuse, he insisted it was true.
• The implausibility of time travel remains a challenge for science fiction writers.
• Her explanation had such implausibility that no one believed her account.
• The implausibility of the claim was evident to anyone with basic knowledge of physics.