1. not seeming reasonable or probable; difficult to believe
Usage: less common than ‘implausible’

Examples

• His excuse for being late seemed completely unplausible.
• The witness gave an unplausible account of the events.
• It’s unplausible that she could finish the project in one day.
• The plot of the movie was so unplausible that audiences laughed.
• Her unplausible explanation raised more questions than answers.
• The defendant’s alibi struck the jury as unplausible.