casualness casually • casualty · · · Info · Definitions · Synonyms · Characters · · casualness · · Text Latin · · Script 10 · · Length Definitions · · · (noun) a casual manner. Synonyms: familiarity. · · Noun Definition 1 Synonyms · · · familiarity · · Synonym 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 l latin small letter l U+006C n latin small letter n U+006E s latin small letter s U+0073 u latin small letter u U+0075