duplex apartment duplex • duplex boiler · · · Info · Definitions · Synonyms · Characters · · duplex apartment · · Text Common · · Latin · · Scripts 16 · · Length 5 · · Syllables Definitions · · · (noun) an apartment having rooms on two floors that are connected by a staircase. Synonyms: duplex apartment, duplex. · · Noun Definition 1 Synonyms · · · duplex · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E p latin small letter p U+0070 r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075 x latin small letter x U+0078