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n. Informal
An indefinitely large number.

[On the model of million, billion, etc.]

jil′lion·aire′ (jĭl′yə-nâr′) n.
jil′lionth adj. & n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Mathematics) informal an extremely large number or amount: jillions of pounds.
[C20: fanciful coinage based on million, billion, etc]
ˈjillionth adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈdʒɪl yən)

n., pl. -lions, (as after a numeral) -lion. Informal.
a vast number.
[1940–45; expressive formation based on million, etc.]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.jillion - a very large indefinite number (usually hyperbole); "there were millions of flies"
large indefinite amount, large indefinite quantity - an indefinite quantity that is above the average in size or magnitude
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


An indeterminately great amount or number:
million (often used in plural), multiplicity, ream, trillion.
Informal: bushel, gob (often used in plural), heap (often used in plural), load (often used in plural), lot, oodles, passel, peck, scad (often used in plural), slew, wad, zillion.
The American Heritage® Roget's Thesaurus. Copyright © 2013, 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


n (inf)Unmenge f, → Unzahl f; jillions of …jede Menge
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007
References in periodicals archive ?
There's a simple elegance to the Remington Rolling Block, and in milsurp circles there are a jillion of them out there.
I remember when one of my former employers once introduced a 'most productive employee of the month' programme to recognise journalists who wrote the most stories in a 30-day period or sub-edited some jillion articles or designed the most number of infographic-powered pages.
And, while everybody in the newsroom has been supportive, I'm especially grateful to my fellow night deskers -- Sean, Jana, Kirby, Kathleen, Amanda and Kevin -- for, like, a jillion things.
To prove this a false flag operation, Davidsson gave a jillion arguments.
For example: About a jillion folks will show up at White Water Bay Saturday morning and the hearty ones will plunge into freezing water to help fund Special Olympics.
'Can those ideas possibly be in that book?' Yeah--and a jillion other ones that I couldn't even get near" (Jensen).
While California Chrome might have won a cool $10million at the world's richest horse race, the iconic starlet's closing concert was worth a jillion bucks!
Professional rugby player Jillion Potter has been knocked down by everything from injury to cancer.
Therefore, the odds of you getting the plague from a flea in your home is about one in a skillion jillion. You have a better chance of being elected president and then getting hit by lightning on your first day in office."
A riddle unwise to the two hundred jillion jillions
You had a jillion startups and lots of money pouring in," said a veteran production exec.
At about 70,000', looking outside, I saw a sight I was not prepared for--the sky was black, you could see stars during the day, visibility was out to the horizon a jillion miles away, and you could easily see the curvature of the earth.