Standard Lemma guide

nonagon

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • Canada, US: /ˈnɑn.ə.ɡɑn/
  • UK: /ˈnɒn.ə.ɡən/
  • Canada: Recorded audio is listed in the source snapshot.

1

noun

Meaning 1

A polygon with nine sides and nine angles; an enneagon.

Definition source: English Wiktionary via Wiktextract

Topics: geometry, mathematics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

a nine-sided polygon

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: polygon, polygonal shape

History

Etymology

From nona- + -gon.

Across languages

Translations

52 source translations are retained for this English entry.

  • Southern Altai: тогустолык (togustolïk) — A polygon with nine sides and nine angles
  • Amharic: ገመሳይ ያልሆኑ (gämäsay yalhonu) — A polygon with nine sides and nine angles
  • Armenian: իննանկյուն (innankyun) — A polygon with nine sides and nine angles
  • Belarusian: дзевяцікутнік (dzjevjacikutnik) — A polygon with nine sides and nine angles
  • Bengali: নবভুজ (nobobhuj) — A polygon with nine sides and nine angles
  • Bulgarian: деветоъгълник (devetoǎgǎlnik) — A polygon with nine sides and nine angles
  • Burmese: နဝဂံ (na.wa.gam) — A polygon with nine sides and nine angles
  • Catalan: enneàgon — A polygon with nine sides and nine angles
  • Chinese Mandarin: 九邊形 /九边形 (jiǔbiānxíng) — A polygon with nine sides and nine angles
  • Czech: devítiúhelník — A polygon with nine sides and nine angles
  • Dutch: negenhoek — A polygon with nine sides and nine angles
  • East Frisian Low German: neegenkâant — A polygon with nine sides and nine angles
  • Esperanto: naŭlatero — A polygon with nine sides and nine angles
  • Finnish: yhdeksänkulmio — A polygon with nine sides and nine angles
  • French: nonagone — A polygon with nine sides and nine angles
  • North Frisian: Niigenhuk — A polygon with nine sides and nine angles
  • Saterland Frisian: Njúgenkaant — A polygon with nine sides and nine angles
  • West-Frisian: njoggenhoek — A polygon with nine sides and nine angles
  • Galician: enneágono — A polygon with nine sides and nine angles
  • Georgian: ცხრაკუთხედი (cxraḳutxedi) — A polygon with nine sides and nine angles
  • German: Nonagon — A polygon with nine sides and nine angles
  • German: Neuneck — A polygon with nine sides and nine angles
  • Greek: εννεάγωνο (enneágono) — A polygon with nine sides and nine angles
  • Greek: εννιάγωνο (enniágono) — A polygon with nine sides and nine angles
  • Hebrew: מתושע (metushá) — A polygon with nine sides and nine angles
  • Hindi: नवकोण (navkoṇ) — A polygon with nine sides and nine angles
  • Hungarian: kilencszög — A polygon with nine sides and nine angles
  • Icelandic: níhyrningur — A polygon with nine sides and nine angles
  • Ido: eneagono — A polygon with nine sides and nine angles
  • Italian: nonagono — A polygon with nine sides and nine angles
  • Italian: ennagono — A polygon with nine sides and nine angles
  • Japanese: 九角形 (kyūkakukei) — A polygon with nine sides and nine angles
  • Kazakh: тоғызбұрыш (toğyzbūryş) — A polygon with nine sides and nine angles
  • Korean: 구각형 (gugakhyeong) — A polygon with nine sides and nine angles
  • Kumyk: тогъуз мююшлюк (toğuz müyuşlük) — A polygon with nine sides and nine angles
  • Macedonian: девета́голник (devetágolnik) — A polygon with nine sides and nine angles
  • Malay: nonagon — A polygon with nine sides and nine angles
  • Polish: dziewięciokąt — A polygon with nine sides and nine angles
  • Portuguese: eneágono — A polygon with nine sides and nine angles
  • Romanian: eneagon — A polygon with nine sides and nine angles
  • Russian: девятиуго́льник (devjatiugólʹnik) — A polygon with nine sides and nine angles
  • Serbo-Croatian: деветоугао — A polygon with nine sides and nine angles
  • Serbo-Croatian: devetougao — A polygon with nine sides and nine angles
  • Slovene: deveterokotnik — A polygon with nine sides and nine angles
  • Spanish: eneágono — A polygon with nine sides and nine angles
  • Spanish: nonágono — A polygon with nine sides and nine angles
  • Swedish: nonagon — A polygon with nine sides and nine angles
  • Swedish: niohörning — A polygon with nine sides and nine angles
  • Tagalog: samsiha — A polygon with nine sides and nine angles
  • Thai: เก้าเหลี่ยม (gâao-lìiam) — A polygon with nine sides and nine angles
  • Turkish: dokuzgen — A polygon with nine sides and nine angles
  • Ukrainian: дев'ятикутник (devʺjatykutnyk) — A polygon with nine sides and nine angles