'flatness' definitions:

Definition of 'flatness'

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

Definition of 'flatness'

From: GCIDE
  • flatness \flat"ness\, n.
  • 1. The quality or state of being flat. [1913 Webster]
  • 2. Eveness of surface; want of relief or prominence; the state of being plane or level. [1913 Webster]
  • 3. Want of vivacity or spirit; prostration; dejection; depression. [1913 Webster]
  • 4. Want of variety or flavor; dullness; insipidity. [1913 Webster]
  • 5. Depression of tone; the state of being below the true pitch; -- opposed to sharpness or acuteness. [1913 Webster]