1. A narrative, explanation, or description that is difficult to believe or lacking credibility due to being unconvincing or inconsistent with known facts
The witness gave an implausible account of the accident that contradicted the physical evidence.
A testemunha deu um relato implausível do acidente que contradisse as evidências físicas.
2. A story or report that seems unlikely to be true based on its internal logic or external context
His implausible account of winning the lottery twice in a row raised many eyebrows.
Seu relato implausível de ganhar a loteria duas vezes seguidas levantou muitas sobrancelhas.