plane geometry plane figure • planeness · · · Info · Definitions · Characters · · plane geometry · · Text Common · · Latin · · Scripts 14 · · Length 5 · · Syllables Definitions · · · (noun) the geometry of 2-dimensional figures. Synonyms: plane geometry. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 e latin small letter e U+0065 g latin small letter g U+0067 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 t latin small letter t U+0074 y latin small letter y U+0079