Shape with one more side than a stop sign

• Canon agonises somewhat to reveal figure
• Drama introduces Harry: touching figure!
• It has nine angles and nine sides
• Shape whose interior angles total 1,260 degrees
• Its internal angles total 1,260 degrees
• Shape of every Baha'i temple
• Nine-sided shape

WordNet Word definitions in WordNet
n. a nine-sided polygon

Wikipedia Word definitions in Wikipedia
In geometry , a nonagon (or enneagon ) is a nine-sided polygon or 9-gon. The name "nonagon" is a prefix hybrid formation, from Latin ( nonus , "ninth" + gonon ), used equivalently, attested already in the 16th century in French nonogone and in English from ...