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Definition of zillion

zillion

/ˈzɪl.jən/
zil · lion
Plural:zillions
•
Adjective:zillion
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zillion Lexical Profile

zillion Game Scores & Validity

• noun

1

An extremely large, indefinite number.

Example

"It felt like there were zillions of stars visible in the clear desert sky."

Synonyms
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Antonyms
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• adjective

1

Extremely numerous; amounting to an indefinitely large number.

Example

"She asked a zillion questions during the museum tour."

Synonyms
View all synonyms for zillion
Antonyms
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Word Nuance & Usage

Unlike 'million' or 'trillion', 'zillion' does not represent a specific mathematical value and is used strictly in informal, hyperbolic contexts.

• Rhymes for zillion

• Nearby Words

zihuatanejo
zilch
zilina
zillion
zillionaire
zillionth
zimbabwe

Word Origin & Etymology

Coined in American English in the 1940s by combining the final letter of the alphabet, 'z' (suggesting an ultimate extent), with the ending '-illion' modeled on 'million', 'billion', and 'trillion'.

Cite this Entry

Wordmom. (2026). Definition of Zillion. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/zillion
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