English · Slang Attested

gillion

In real, traceable use. Part of the curated seed collection; community review is coming.

Meaning · English

An unspecified large number (of).

Where it’s used: Used American English

Examples

At Guy's school there had been an outdoor pool, in use from April to October, a watery grave for a billion insects, or quite possibly a gillion or a squillion. The bright turquoise lining had wrinkled under the children's feet.

Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).

Common questions

What does “gillion” mean?

An unspecified large number (of).

Is “gillion” formal or informal?

gillion is generally slang.

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