Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “zillion”


noun [C]    /ˈzɪl·jən/ infml
an extremely large number or amount: There were zillions of people to help you, all the time.
(Definition of zillion noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
Focus on the pronunciation of zillion

Definitions of “zillion” in other dictionaries

Word of the Day


the quality of knowing someone very well, liking them a lot, and wanting to spend a lot of time together

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More