zillion

noun

zil·​lion ˈzil-yən 

: an indeterminately large number

zillions of mosquitoes

zillionth

ˈzil-yən(t)th 

adjective

Examples of zillion in a Sentence

I have a zillion chores to finish before we can leave.

Recent Examples on the Web

That said, 2028 is a zillion political light years and countless news cycles away. —Mark Z. Barabak, Los Angeles Times, 22 June 2025

That depends on your tolerance for the sight and sound of zillions of winged bugs appearing at once, settling in trees, getting crunched underfoot, and often splooching against your windshield. —Jeffrey Kluger, Time, 8 May 2025

There are a zillion different kinds of breathing and meditation out there. —Rustin Dodd, New York Times, 1 May 2025

To him, a chatbot that has analyzed zillions of SAT-style questions, legal briefs, and lines of code is not smart so much as well prepared—for the SAT, a law-school exam, advanced coding problems, whatever. —Matteo Wong, The Atlantic, 4 Apr. 2025

Word History

Etymology

z + -illion (as in million)

First Known Use

1934, in the meaning defined above

Rhymes for zillion

• billion
• million
• pillion
• trillion
• castilian
• civilian
• cotillion
• pavilion
• postilion
• quadrillion
• reptilian
• vermilion

Kids Definition

zillion

noun

zil·​lion ˈzil-yən 

: a large number

zillions of ants