FLATNESS

Definition

1. noun the property of having two dimensions. — synonyms: two-dimensionality, planeness
2. noun a want of animation or brilliance.
3. noun a deficiency in flavor.
4. noun the property of having little or no contrast. — synonyms: lusterlessness, lustrelessness, mat, matt, matte
5. noun inactivity. — synonyms: languor, lethargy, sluggishness, phlegm