Definition of “zillion” - English Dictionary

british dictionary

“zillion” in British English

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zillionnoun [ C ]

uk /ˈzɪl.jən/ us /ˈzɪl.jən/ informal

an extremely large, but not an exact, number:

I've told you a zillion times/zillions of times not to do that.

(Definition of “zillion” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“zillion” in American English

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zillionnoun [ C ]

us /ˈzɪl·jən/ infml

an extremely large number or amount:

There were zillions of people to help you, all the time.

(Definition of “zillion” from the Cambridge Academic Content Dictionary © Cambridge University Press)