1. An accomplishment or success that has not been verified, confirmed, or substantiated through evidence or testing
His claim of winning the championship remains an unproven achievement without official documentation.
Sua alegação de ganhar o campeonato permanece uma realização não comprovada sem documentação oficial.
2. A feat or accomplishment whose validity or authenticity is questionable or uncertain
The startup's unproven achievements in the market made investors hesitant.
As realizações não comprovadas da startup no mercado deixaram os investidores hesitantes.