Top definition
One who belongs to the lowest caste in Aldous Huxley's book Brave New World. Known for stunted growth, inferior intelligence, yet indispensibility. After death, they play a crucial role in phosphate reclamation. In short, a useful idiot.

Also known as "Epsilon-minus semi-moron"
Everyone works for everyone else. We can't do witout anyone. Even Epsilons are useful. We couldn't do without Epsilons.
by Douglas Weltman June 28, 2003
Happy St. Patties Day!
1) A really really small positive number (i.e. 0.00000001)
2) The fifth letter of the greek alphabet
3) What mathematicians such as Paul Erdos call little kids; a beautiful use of definition #1
"That's a cute epsilon! Is it a boss or a slave?" - Paul Erdos, Hungarian mathematician (obtained from 'The Man who loved Only Numbers')
by Sasha Ramani September 07, 2005
Happy St. Patties Day!
buy the domain for your foodie vlog
A high level candidate for the order of NoyNoy (headquarter in Gothenburg, Sweden)
hey! Epsilon get over here and make me a drink. You are no NoyNoy yet.
by beskrivningsbyrans mastare March 27, 2010
Happy St. Patties Day!
Epsilon is a cult on Grand Theft Auto Sanandreas. Somewhat secret, if you listen it can found. The cults symbol is a E part way on top of a T
listen to epsilon on the talk radio.
bump in to one of the hikers and listen.
by Coonotafoo October 22, 2011
Happy St. Patties Day!
1. A small quantity.

2. Something that can be safely overlooked.

3. Something very small.
1. These french fries need epsilon more salt.

2. Ignore the tax, it is just an epsilon.

3. What a cute little epsilon!
by node-edon April 02, 2006
Happy St. Patties Day!
A joker and a spammer, Very annoying to others. Born with artistic skills
code name #9
by epsilon December 01, 2003
Happy St. Patties Day!
noun - an autistic vaccinated fluoride head/fluoridated vaccine head child as a reference to Aldous Huxley's "Brave New World" class of skilled but non-communicative workers
With the current rate of vaccine related autism the epsilons will outnumber the rest by 2025.
by badintense September 06, 2015
Happy St. Patties Day!