sə̇ˈrenəd.ē, -nətē, -i noun
( -es )
Etymology: Middle French serenité, from Latin serenitat-, serenitas, from serenus serene + -itat-, -itas -ity
1. : the quality or state of being serene : calm , peacefulness , repose
the serenity of a mind at ease with itself and kindly disposed towards everyone — Jane Austen
2. usually capitalized : a person of honor
Highnesses, Serenities, and Excellencies … arrived from all quarters — W.M.Thackeray
— used as a title of honor given to reigning princes and other dignitaries
your Serenity