Akademik

flatness
noun
1. the property of having two dimensions (Freq. 9)
Syn: ↑two-dimensionality, ↑planeness
Derivationally related forms: ↑plane (for: ↑planeness), ↑flat, ↑two-dimensional (for: ↑two-dimensionality)
Hypernyms: ↑dimensionality
2. a want of animation or brilliance
-

the almost self-conscious flatness of Hemingway's style

Derivationally related forms: ↑flat
Hypernyms: ↑expressive style, ↑style
3. a deficiency in flavor
-

it needed lemon juice to sharpen the flatness of the dried lentils

Derivationally related forms: ↑flat
Hypernyms: ↑taste, ↑taste sensation, ↑gustatory sensation, ↑taste perception, ↑gustatory perception
4. the property of having little or no contrast; lacking highlights or gloss
Syn: ↑lusterlessness, ↑lustrelessness, ↑mat, ↑matt, ↑matte
Derivationally related forms: ↑matte (for: ↑matte), ↑matt (for: ↑matt), ↑mat (for: ↑mat), ↑lustreless (for: ↑lustrelessness), ↑lusterless (for: ↑lusterlessness), ↑flat
Hypernyms: ↑dullness
5. inactivity; showing an unusual lack of energy
-

the general appearance of sluggishness alarmed his friends

Syn: ↑languor, ↑lethargy, ↑sluggishness, ↑phlegm
Derivationally related forms: ↑phlegmatic (for: ↑phlegm), ↑phlegmatical (for: ↑phlegm), ↑sluggish (for: ↑sluggishness), ↑lethargic (for: ↑lethargy), ↑languorous (for: ↑languor)
Hypernyms: ↑inactiveness, ↑inactivity, ↑inertia

Useful english dictionary. 2012.