Noah Webster
Evenness
E'VENNESS, noun The state of being even, level or smooth; equality of surface.
1. Uniformity; regularity; as evenness of motion.
2. Freedom from inclination to either side; equal distance from either extreme.
3. Horizontal position; levelness of surface; as the evenness of a fluid at rest.
4. Impartiality between parties; equal respect.
5. Calmness; equality of temper; freedom from perturbation; a state of mind not subject to elevation or depression; equanimity.