gigajillion

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noun

An enormously large number; arbitrarily many

OriginEnglish jillion ← Ancient Greek γίγας (gígas) →
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Meanings

noungigajillion (plural gigajillions)

plural gigajillions

  1. humorousinformalAn enormously large number; arbitrarily many

    On the other hand, a single snow crystal contains perhaps 100 million molecules, which can be arranged in a gigajillion different ways.

    1988 February 5, Cecil Adams, “The Straight Dope”, in Chicago Reader

Origin

  1. Ancient GreekΓίγας (Gígas)
  2. Ancient Greekγίγας (gígas)
  3. Englishgiga-
  4. Englishjillion
  5. Englishgigajillion

From giga- + jillion.

Full word history & related roots →
Cite this entry
APA

gigajillion. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/gigajillion

MLA

“gigajillion.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/gigajillion. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “gigajillion,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/gigajillion.

Source: gigajillion on Wiktionary, CC BY-SA 4.0.