1. not clearly expressed or defined; lacking specific details
2. not clearly seen or remembered; indistinct

Examples

• The instructions were too vague to follow properly.
• She gave only a vague description of the suspect.
• I have a vague memory of meeting him before.
• His answer was deliberately vague and unhelpful.
• The outline of the building was vague in the fog.
• The politician made vague promises about tax reform.
• There’s a vague resemblance between the two sisters.