Serenity

Se*ren"i*ty (?), n. [L. serenuas: cf. F. sérénité.] 1. The quality or state of being serene; clearness and calmness; quietness; stillness; peace.

A general peace and serenity newly succeeded a general trouble.

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.

☞ Serenity is given as a title to the members of certain princely families in Europe; as, Your Serenity.