1. A topic or matter that is unclear, indefinite, or lacking in specific details or precision
The meeting focused on a vague subject that left everyone confused about the actual goals.
A reunião se concentrou em um assunto vago que deixou todos confusos sobre os objetivos reais.
2. In grammar, a subject of a sentence that is unclear or does not have a definite antecedent
In the sentence 'It says here that we should leave,' the subject 'it' is vague.
Na frase 'Diz aqui que devemos sair,' o sujeito 'diz' é vago.