grandnephew grandmotherly • grandness · · · Info · Definitions · Synonyms · Characters · · grandnephew · · Text Latin · · Script 11 · · Length Definitions · · · (noun) a son of your niece or nephew. Synonyms: great-nephew. · · Noun Definition 1 Synonyms · · · great-nephew · · Synonym 1 Characters · · a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 g latin small letter g U+0067 h latin small letter h U+0068 n latin small letter n U+006E p latin small letter p U+0070 r latin small letter r U+0072 w latin small letter w U+0077