Word.ws English Dictionary

umptillion

umptillion noun: an extremely large, unspecified number.

Noun

umptillion (plural umptillions)

  1. (excessive, slang) An extremely large, unspecified number.
    • The cosmos is stranger than I can know: full of change, full of beauty. The rich tapestry of interlocking fields and forces weaves umptillion configurations, and every one is beautiful.2010, Lou Anders, Fast Forward 2
    • "Sarah tells me you work for a magazine." Rufus studied the living room while my mother studied him. "Why, that must be it, right there?" There were umptillion copies of Her strewn not so casually across the glass face of the coffee table by our couch, so it was hard to tell which one Baylor...2017, Louise Hawes, The Language of Stars
    Synonyms:
    zillion

Synonyms of umptillion

Forms of umptillion

pluralumptillions

Origin of umptillion

From umpty + -illion.

Questions about umptillion

What does umptillion mean?
Umptillion means an extremely large, unspecified number.
What part of speech is umptillion?
Umptillion is a noun.
What is the plural of umptillion?
The plural of umptillion is umptillions.

Words near umptillion in the dictionary

  1. umptekite
  2. umptekites
  3. umptekitic
  4. umptiest
  5. umptieth
  6. umptillion
  7. umptillions
  8. umpty
  9. umpty-ump
  10. umpty-umpth
  11. umpy

Source and license

Adapted from Wiktionary: umptillion (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Pronunciation audio from Wikimedia Commons, each file under its own free license: En-au-umptillion.ogg.

Cite this entry: “umptillion.” Word.ws, https://word.ws/umptillion. Based on Wiktionary, CC BY-SA 4.0.