Serenity
Pronunciation : Se*ren"i*ty
Part of Speech : n.
Etymology : [L. serenuas: cf. F. s?r?nit?.]
Definition : 1. The quality or state of being serene; clearness and calmness; quietness; stillness; peace. A general peace and serenity newly succeeded a general trouble. Sir W. Temple.
2. Calmness of mind; eveness of temper; undisturbed state; coolness; composure. I can not see how any men should ever transgress those moral rules with confidence and serenity. Locke.
Note: Serenity is given as a title to the members of certain princely families in Europe; as, Your Serenity.
Source : Webster's Unabridged Dictionary, 1913