concave polygon concaveness • concave polyhedron · · · Info · Definitions · Antonyms · Characters · · concave polygon · · Text Common · · Latin · · Scripts 15 · · Length 5 · · Syllables Definitions · · · (noun) a polygon such that there is a straight line that cuts it in four or more points. Synonyms: concave polygon. · · Noun Definition 1 Antonyms · · · convex polygon · · Antonym 0 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 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 o latin small letter o U+006F p latin small letter p U+0070 v latin small letter v U+0076 y latin small letter y U+0079