1. An indefinite or unclear agreement or obligation that lacks specific details, timeframe, or concrete terms
He made a vague commitment to help with the project sometime in the future.
Ele fez um compromisso vago de ajudar com o projeto em algum momento no futuro.
2. A non-binding or loosely defined promise that is open to interpretation
Their vague commitment to environmental protection lacked concrete actions.
Seu compromisso vago com a proteção ambiental carecia de ações concretas.