Synonyms

jillion

American

[jil-yuhn] / ˈdʒɪl yən /

noun

an indefinitely vast number; zillion.

adjective

of or noting such a quantity.

a jillion problems.

jillion British

/ ˈdʒɪljən /

noun

informal an extremely large number or amount

jillions of pounds

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

jillionth noun

Etymology

Origin of jillion

First recorded in 1940–45; expressive formation based on million, billion, etc.

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Barkley has spent all season breaking tackles for a jillion yards, and there’s no reason to think he won’t do that Sunday.

From Los Angeles Times • Feb. 8, 2025

It’s not unlike opening your garbage can and taking a big sniff, but multiplied by about one jillion.

From Seattle Times • Jan. 5, 2024

Each week I read a jillion jokes to find the best material, Deciding which to print with my authority imperial.

From Washington Post • Feb. 18, 2021

“You could have a jillion chickens on this roof.”

From New York Times • Aug. 23, 2013

The black streaks held the salt that Papa said had got mixed up with the rocks a jillion years ago.

From "Old Yeller" by Fred Gipson

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023