1. The property of having two dimensions
   - two-dimensionality, planeness 
2. A want of animation or brilliance
   "the almost self-conscious flatness of Hemingway's style" 
3. A deficiency in flavour
   "it needed lemon juice to sharpen the flatness of the dried lentils" 
4. The property of having little or no contrast; lacking highlights or gloss
   - lusterlessness [N. Amer], lustrelessness [Brit, Cdn], mat, matt, matte 
5. Inactivity; showing an unusual lack of energy
   - languor, lethargy, sluggishness, phlegm

Derived forms: flatnesses

See also: flat

Type of: dimensionality, dullness, expressive style, gustatory perception, gustatory sensation, inactiveness, inactivity, inertia, style, taste, taste perception, taste sensation

Encyclopedia: Flatness

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