1. A feeling of dissatisfaction, anger, or annoyance resulting from unmet expectations or blocked goals
The frustration of waiting in traffic made him irritable.
A frustração de ficar preso no trânsito o deixou irritável.
2. The act of preventing something from succeeding or being fulfilled
The frustration of his plans was due to lack of funding.
A frustração de seus planos foi devida à falta de financiamento.
3. A state of disappointment when desires or expectations are not satisfied
She expressed her frustration about the delayed project.
Ela expressou sua frustração sobre o projeto atrasado.