flatness

(n) the property of having two dimensions planeness, two-dimensionality,
(n) a want of animation or brilliance
- the almost self-conscious flatness of Hemingway's style
(n) a deficiency in flavor
- it needed lemon juice to sharpen the flatness of the dried lentils
(n) the property of having little or no contrast; lacking highlights or gloss lusterlessness, lustrelessness, matt, matte, mat,
(n) inactivity; showing an unusual lack of energy
- the general appearance of sluggishness alarmed his friends
languor, lethargy, phlegm, sluggishness,

planeness two-dimensionality lusterlessness lustrelessness matt matte mat languor lethargy phlegm sluggishness