jillion

/ˈd͡ʒɪljən/

//ˈd͡ʒɪljən// noun

"jillion" is a 7-letter English headword indexed on PlainSpell.

The verdict

“jillion” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.

Unranked
below top-frequency English
7
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - An unspecified large number (of).

Corpus desk

Index EN-jillion · jillion · English

jillion · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-LONG 7 letters
  • VOW-3 3 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "J" thin
  • PHOTO-UNK Peer pending

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Key facts for jillion
PropertyValue
Headwordjillion
LanguageEnglish
Part of speechNoun
IPA/ˈd͡ʒɪljən/
Letters7
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “jillion” in English

jillionranks outside the top 100,000 English headwords, in the long tail of specialist, archaic, or seldom-used vocabulary, exactly the territory where a reader stops mid-sentence to double-check spelling.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

jillion is uncommon English outside the top frequency list, classed as anoun, transcribed /ˈd͡ʒɪljən/. Rarity is why readers land here mid-draft. Gloss: "An unspecified large number (of).".

No generated misspelling entries exist for jillion in our index, suggesting the orthography follows predictable English patterns. No close-neighbour confusable shows up for this headword in our dataset, since nothing in our dataset looks or sounds close enough to cause mix-ups.

Etymologically, the entry records: See -illion. The correct English form is jillion, spelled J-I-L-L-I-O-N.

Definition

  1. 1
    An unspecified large number (of).

Recorded use

Wiktionary examples

These source excerpts show how jillion appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. I know this has been asked a jillion times, but news server displays only one days^([sic]) worth of posts..
  2. “One jillion dollars!”

Etymology

See -illion.

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "jillion"?
"jillion" is spelled J-I-L-L-I-O-N. The IPA pronunciation is /ˈd͡ʒɪljən/.
What does "jillion" mean?
As a noun, "jillion" means: An unspecified large number (of).
How do you pronounce "jillion"?
The IPA (International Phonetic Alphabet) transcription for "jillion" is /ˈd͡ʒɪljən/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "jillion"?
See -illion. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list