1. the quality of being unclear, imprecise, or not clearly expressed
2. the state of being indistinct or not clearly defined in outline or detail

Examples

• The vagueness of his instructions left everyone confused about what to do.
• She was frustrated by the vagueness of the contract terms.
• The vagueness of the photograph made it difficult to identify the person.
• His answer was criticized for its vagueness and lack of specific details.
• The vagueness of her memory made it hard to recall exactly what happened.
• The committee complained about the vagueness of the proposed policy changes.