num · 3 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.
UK:/ɒkˈtɪl.iː.ən/
Australia:Recorded audio is listed in the source snapshot.
rhymes with -ɪljən
CMU ARPABET:AA0 K T IH1 L Y AH0 N
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
num
Meaning 1
A thousand trillion trillion, a billion billion billion: 1 followed by 27 zeros, 1027.
Definition source: English Wiktionary via Wiktextract
Usage: Australia, UK, US, modern
Qualifier: short scale
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
num
Meaning 2
A trillion quintillion: 1 followed by 48 zeros, 1048.
Definition source: English Wiktionary via Wiktextract
Usage: Australia, UK, dated
Qualifier: long scale
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
noun
Meaning 3
the number that is represented as a one followed by 27 zeros
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Broader terms: large integer
History
Etymology
From French octillion. By surface analysis, oct- (“eight”) + -illion.
Across languages
Translations
27 source translations are retained for this English entry.
Armenian:
հազար քառիլիոն
(hazar kʻaṙilion)
— a thousand trillion trillion, 10
Esperanto:
kvariliardo
— a thousand trillion trillion, 10
Finnish:
kvadriljardi
— a thousand trillion trillion, 10
French:
quadrilliard
— a thousand trillion trillion, 10
German:
Quadrilliarde
— a thousand trillion trillion, 10
Hungarian:
kvadrilliárd
— a thousand trillion trillion, 10
Icelandic:
kvaðrilljarður
— a thousand trillion trillion, 10
Italian:
quatriliardo
— a thousand trillion trillion, 10
Japanese:
千秭
— a thousand trillion trillion, 10
Malay:
oktilion
— a thousand trillion trillion, 10
Maltese:
ottiljun
— a thousand trillion trillion, 10
Maltese:
kwadriljard
— a thousand trillion trillion, 10
Polish:
kwadryliard
— a thousand trillion trillion, 10
Portuguese:
octilhão
— a thousand trillion trillion, 10
Russian:
октиллион
(oktillion)
— a thousand trillion trillion, 10
Spanish:
mil cuatrillones
— a thousand trillion trillion, 10
Spanish:
octillón
— a thousand trillion trillion, 10
Turkish:
oktilyon
— a thousand trillion trillion, 10
Ukrainian:
октильйон
(oktylʹjon)
— a thousand trillion trillion, 10
Welsh:
octiliwn
— a thousand trillion trillion, 10
Chinese Mandarin:
一極 /一极
— a trillion quintillion, 1048 — see also quindecillion
Esperanto:
okiliono
— a trillion quintillion, 1048 — see also quindecillion
Finnish:
oktiljoona
— a trillion quintillion, 1048 — see also quindecillion
French:
octillion
— a trillion quintillion, 1048 — see also quindecillion
German:
Oktillion
— a trillion quintillion, 1048 — see also quindecillion
Russian:
квиндециллион
(kvindecillion)
— a trillion quintillion, 1048 — see also quindecillion
Spanish:
octillón
— a trillion quintillion, 1048 — see also quindecillion