1. A plan or scheme that lacks clarity, specificity, or concrete details; an indefinite or unclear course of action
He presented a vague plan for the project without concrete steps.
Ele apresentou um plano vago para o projeto sem passos concretos.
2. A plan that is poorly defined or loosely organized, lacking precision in its objectives or methods
Their vague plan to expand the business needed more detail.
O plano vago deles para expandir o negócio precisava de mais detalhes.