Word Pronunciation & Dictionary

octillion

/ɒkˈtɪl.iː.ən/

Word Rarity Very rare

Frequency: Zipf frequency 0.00 in modern English

Syllables
oct-il-li-on
IPA
/ɒkˈtɪl.iː.ən/
11
Scrabble Score
9
Letters
4
Syllables
6
Unique Chars

Meaning

num

A thousand trillion trillion, a billion billion billion: 1 followed by 27 zeros, 10²⁷.

Australian usage; British usage; American usage

num

A trillion quintillion: 1 followed by 48 zeros, 10⁴⁸.

Australian usage; British usage; Dated

Example Sentences

Etymology

From French octillion. By surface analysis, oct- (“eight”) + -illion.

Origin

Word Breakdown

Regional Pronunciation

  • British English: /ɒkˈtɪl.iː.ən/

Usage

Inflected Forms

Derived Forms

Phrases

Previous: septillion. Next: nonillion.

Frequently Paired Words

Previous: septillion. Next: nonillion.

Synonyms

1027 1048

Rhymes With

Questions

How do you pronounce octillion?
The recorded pronunciation is /ɒkˈtɪl.iː.ən/.
What does octillion mean?
A thousand trillion trillion, a billion billion billion: 1 followed by 27 zeros, 10²⁷.
Where does octillion come from?
It is traced to French.

How to pronounce octillion

  1. Open the pronunciation page — Open the Speakur entry for “octillion”.
  2. Read the phonetic spelling — Read the IPA spelling (/ɒkˈtɪl.iː.ən/) so you know which sounds to aim for.
  3. Play the audio — Click Play to hear reference audio for “octillion”.
  4. Repeat and practice — Say “octillion” aloud, matching stress and vowels until it feels natural.