flatness

flat·ness

flatness

n.
  1. The quality or state of being flat.
  2. Eveness of surface; want of relief or prominence; the state of being plane or level.
  3. Want of vivacity or spirit; prostration; dejection; depression.
  4. Want of variety or flavor; dullness; insipidity.
  5. Depression of tone; the state of being below the true pitch; -- opposed to sharpness or acuteness.