serenity serenissimo • serenize · · · Info · Definitions · Synonyms · Characters · · serenity · · Text Latin · · Script 8 · · Length Definitions · · · (noun) a disposition free from stress or emotion. Synonyms: repose, quiet, placidity, tranquillity, tranquility. · · Noun Definition 1 (noun) the absence of mental stress or anxiety. Synonyms: peace, peacefulness, peace of mind, repose, heartsease, ataraxis. · · Noun Definition 2 Synonyms · · · repose · · Synonym 1 quiet · · Synonym 2 placidity · · Synonym 3 tranquillity · · Synonym 4 tranquility · · Synonym 5 peace · · Synonym 6 peacefulness · · Synonym 7 peace of mind · · Synonym 8 heartsease · · Synonym 9 ataraxis · · Synonym 10 Characters · · e latin small letter e U+0065 i latin small letter i U+0069 n latin small letter n U+006E r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 y latin small letter y U+0079