flatness

noun

1. 1

   inactivity; showing an unusual lack of energy

   the general appearance of sluggishness alarmed his friends

2. 2

   the property of having little or no contrast; lacking highlights or gloss

3. 3

   the property of having two dimensions

4. 4

   a deficiency in flavor

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

5. 5

   a want of animation or brilliance

   the almost self-conscious flatness of Hemingway's style