1. Evidence or proof that is fragile, weak, unreliable, or easily refuted; insufficient grounds for a conclusion
The defendant's alibi was based on prova frágil that the prosecution easily challenged.
O álibi do réu era baseado em prova frágil que a acusação facilmente contestou.
2. In legal contexts, testimony or documentation lacking sufficient strength to support a claim or conviction
The judge dismissed the case due to prova frágil presented by the plaintiff.
O juiz arquivou o caso devido à prova frágil apresentada pelo autor.