Webster's 1828 Dictionary
EVENNESS
n.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.
Webster's 1913 Dictionary
EVENNESS
EVENNESS E "ven *ness, n.
Defn: The state of being ven, level, or disturbed; smoothness; horizontal position; uniformity; impartiality; calmness; equanimity; appropriate place or level; as, evenness of surface, of a fluid at rest, of motion, of dealings, of temper, of condition. It had need be something extraordinary, that must warrant an ordinary person to rise higher than his own evenness. Jer. Taylor.
Sanseido Wisdom Dictionary
evenness
é ven ness 名詞 U 1 平らなこと .2 均等, 平等 .3 平静, 落ち着き .
The Wordsmith Dictionary