planeness plane • planer · · · Info · Definitions · Synonyms · Characters · · planeness · · Text Latin · · Script 9 · · Length Definitions · · · (noun) the property of having two dimensions. Synonyms: two-dimensionality, flatness. · · Noun Definition 1 Synonyms · · · two-dimensionality · · Synonym 1 flatness · · Synonym 2 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 l latin small letter l U+006C n latin small letter n U+006E p latin small letter p U+0070 s latin small letter s U+0073