quadrillion.
A thousand trillion (logic: 1,000 × 1,000⁴): 1 followed by fifteen zeros, 10¹⁵.
Meaning & usage
A thousand trillion (logic: 1,000 × 1,000⁴): 1 followed by fifteen zeros, 10¹⁵.
A million trillion (logic: 1,000,000⁴): 1 followed by twenty-four zeros, 10²⁴.
Where this word comes from
From French quadrillion, from quadri- (“four”) + -illion. By surface analysis, quadr- + -illion.
Any very large number, exceeding normal description.
Where this word comes from
From French quadrillion, from quadri- (“four”) + -illion. By surface analysis, quadr- + -illion.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.