Top Definition
The largest number possible because it kills all the other numbers.
I'm a killion times better at Excel than Callum!
by Lochlan April 04, 2007
the largest number in the world. made popular by Ali G
it is usually made to exaderate
"How long will it take? Like a KILLION minutes?"
by a-nat June 19, 2006
1. Vast amounts of money earned through the death or suffering of people, hence the “Kill” in Killions.

Industries such as the illegal drug trade, gun manufacturing, the oil and coal industries, etc. all make Killions of dollars each year, at the expense of thousands of innocent civilians around the world.
Monsanto makes Killions of dollars every year while it poisons us with pesticides and other toxins in our drinking water.
by Dr. Carey Perkins August 19, 2016
one thousand. Patterned after million, billion, trillion, etc.
A killion people participated in the funeral of the leader.
by uttam maharjan December 21, 2011
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