grand duchy grand duchess • grand duchy of luxembourg · · · Info · Definitions · Characters · · grand duchy · · Text Common · · Latin · · Scripts 11 · · Length 3 · · Syllables Definitions · · · (noun) the domain controlled by a grand duke or grand duchess. Synonyms: grand duchy. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 d latin small letter d U+0064 g latin small letter g U+0067 h latin small letter h U+0068 n latin small letter n U+006E r latin small letter r U+0072 u latin small letter u U+0075 y latin small letter y U+0079