interior angle interior • interior decoration · · · Info · Definitions · Synonyms · Characters · · interior angle · · Text Common · · Latin · · Scripts 14 · · Length 5 · · Syllables Definitions · · · (noun) the angle inside two adjacent sides of a polygon. Synonyms: interior angle, internal angle. · · Noun Definition 1 Synonyms · · · internal angle · · Synonym 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 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074