plane angle plane • plane chart · · · Info · Definitions · Characters · · plane angle · · Text Common · · Latin · · Scripts 11 · · Length 3 · · Syllables Definitions · · · (noun) an angle formed by two straight lines (in the same plane). Synonyms: plane angle. · · 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 n latin small letter n U+006E p latin small letter p U+0070