Stability is the state of being resistant to change and not prone to wild fluctuations in emotion.(noun)
An example of stability is a calm, stable life where you don't have wild ups and downs.
See stability in Webster's New World College Dictionary
noun pl. stabilities
Origin: ME stablete < OFr stableté < L stabilitas
See stability in American Heritage Dictionary 4
noun pl. sta·bil·i·ties
Learn more about stability