Top Definition
Infinity minus one.

It is the "event horizon" of numbers before they break down and just turn into infinity.

Beneplex is the largest number possible.

There must be like, a beneplex of things in the universe besides me.

Charlie Sheen must have done like a Beneplex of cocaine in his life!

Ben made a number? he must have named it after his ego and hipsterism...Ya its called "Beneplex"
by February 15, 2012
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