Definition of vagueness (noun)
- unclearness by virtue of being poorly expressed or not coherent in meaning
- "the Conservative manifesto is a model of vagueness"; "these terms were used with a vagueness that suggested little or no thought about what each might convey"
- indistinctness of shape or character
- "the scene had the swirling vagueness of a painting by Turner"
Source: Princeton University Wordnet