Standard Lemma guide

undecillion

num · 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.

  • /ˌʌndəˈsɪl.i.ən/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • rhymes with -ɪljən

1

num

Meaning 1

1036.

Definition source: English Wiktionary via Wiktextract

Usage: US

Qualifier: modern British & Australian; short scale; modern British & Australian; short scale

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

num

Meaning 2

1066.

Definition source: English Wiktionary via Wiktextract

Qualifier: dated British & Australian; long scale; dated British & Australian; long scale

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

From Latin undecim (“eleven”) + -illion. By surface analysis, undec- + -illion.

Across languages

Translations

14 source translations are retained for this English entry.

  • Esperanto: sesiliono — 1036 — see also sextillion
  • Finnish: sekstiljoona — 1036 — see also sextillion
  • German: Sextillion — 1036 — see also sextillion
  • Hungarian: szextillió — 1036 — see also sextillion
  • Icelandic: sextilljarður — 1036 — see also sextillion
  • Japanese: 澗 (kan) — 1036 — see also sextillion
  • Malay: undesilion — 1036 — see also sextillion
  • Polish: sekstylion — 1036 — see also sextillion
  • Russian: ундециллион (undecillion) — 1036 — see also sextillion
  • Finnish: undekiljoona — 1066 — see also unvigintillion
  • French: undécillion — 1066 — see also unvigintillion
  • German: Undezillion — 1066 — see also unvigintillion
  • Mongolian: сэтгэшгүй (setgešgüj) — 1066 — see also unvigintillion
  • Polish: undecylion — 1066 — see also unvigintillion