Flatness may refer to:
- Flatness (art)
- Flatness (cosmology)
- Flatness (electrical engineering)
- Flatness (liquids)
- Flatness (manufacturing), a geometrical tolerance required in certain manufacturing situations
- Flatness (mathematics)
- Flatness (systems theory), a property of nonlinear dynamic systems
- Flat intonation
Famous quotes containing the word flatness:
“On a level plain, simple mounds look like hills; and the insipid flatness of our present bourgeoisie is to be measured by the altitude of its “great intellects.””
—Karl Marx (1818–1883)