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ENGLISH · A WORD WITH POSSIBILITIES

gillion.

A thousand million, proposed as an alternative to the (now little used) British milliard and the (ambiguous, in the UK) US billion.

7 characters2 syllables approx.English language

Meaning & usage

num/ˈɡɪljən//ˈd͡ʒɪljən/
  1. A thousand million, proposed as an alternative to the (now little used) British milliard and the (ambiguous, in the UK) US billion.

    UK · rare
Where this word comes from

From gi(ga)- + -illion. Modelled after million, billion etc. Compare also jillion.

noun/ˈɡɪljən//ˈd͡ʒɪljən/
  1. An unspecified large number (of).

    excessive · slang
Where this word comes from

From gi(ga)- + -illion. Modelled after million, billion etc. Compare also jillion.

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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.