insubordination insubordinateness • insubstantial · · · Info · Definitions · Synonyms · Antonyms · Characters · · insubordination · · Text Latin · · Script 15 · · Length Definitions · · · (noun) defiance of authority. · · Noun Definition 1 (noun) an insubordinate act. Synonyms: rebelliousness. · · Noun Definition 2 Synonyms · · · rebelliousness · · Synonym 1 Antonyms · · · subordination · · Antonym 0 Characters · · a latin small letter a U+0061 b latin small letter b U+0062 d latin small letter d U+0064 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075