A person who believes that out of nothing, nothing created something, that something expanded and cooled to form the universe. Some very small things on one part of the universe came together by complete chance and those things just happened to evolve into larger lifeforms, succeeding in avoiding everything that could have wiped them out, and these larger life-forms happened to evolve into sentient beings with no outside help...right.............
Yes, i am an atheist. I believe that it was complete chance that formed the universe and all the life forms that currently inhabit it, no matter how unlikely that is, so I am curretly desperately searching for ways to prove that the universe is random, but not succeeding.
by madman_salvo March 13, 2008
A highly disputed term that can have any number of meanings.

The following are three colloquial definitions as understood and used by the average American:
1) Someone who believes that there is no God/Gods
2) That asshole who spends all of his time arguing with or scoffing at Christians about their beliefs.
3) A socially-depraved menace to society bent on burning our churches and brainwashing our children into joining their cult which is really based on worshiping Satan and may be headed by the Jews in their attempt to control the world's money and media in order to enslave us all... (I can go on)

But it's only fair to explain atheism as defined by atheists. After all, they are the ones who identify with the term. So what do THEY believe?

Generally, there are two strains of atheism, as used by atheists:
1. "Strong" atheism- The belief that there are no Gods
2. "Weak" atheism- The lack of belief in Gods

The vast majority of atheists fall into category 2. You're hard-pressed to find an atheist who is absolutely certain that there is no God.

There is a confusion about the terms "agnosticism" and "atheism" and it's important to make the distinction clear.

Agnosticism is a position concerning knowledge of Gods. Agnostics either:
1) believe that there is no way to know for certain whether or not there are Gods
2) are undecided on the issue because they currently lack sufficient evidence

Meanwhile, atheism/theism are positions concerning what you do and do not believe regardless of any claims to knowledge. Thus, fusions between the two are likely:

Agnostic atheist- I do not believe in any Gods because 1) or 2)
Agnostic theist- I believe despite 1) or 2) for any number of reasons (fear of hell, hope, comfort, feeling that there must be some great power/first cause, etc.)

Most self-proclaimed "agnostics" are also atheists. It's very common to hear someone who calls him/herself an agnostic say,
"I don't know whether or not there is a God, so I am neither a theist nor an atheist". But like the second strain of atheism, they do NOT have belief in any Gods. If they did believe, then they wouldn't be undecided! Thus, they are undecided and without belief (agnostic atheist). In much the same way, you can say that all infants and animals are also agnostic atheists!

Now, I say this is true for MOST self-proclaimed agnostics because I have yet to hear someone call him/herself an agnostic AND claim to believe in a God. This is because most self-proclaimed agnostics think of agnosticism as a third-choice between atheism and theism. I'm of the personal opinion that this is largely due to the many negative connotations surrounding the term "atheist" (see colloquial definitions above)

I apologize for the obscene length of this definition (inb4 tl;dr!), so I won't go into detail concerning this next point:
Atheism is NOT a religion. For the same reason, theism is also not a religion. You need more than mere belief/disbelief in a God(s) to be aptly identified as a religion.
Bob: Hey Fred!
Fred: Hey Bob!
Bob: You know, in all our many years of friendship, I've never asked you a simple question. Do you believe in God?
Fred: I'm an atheist-
*violence*
Bob: WRYYYYYYYYYYYYYYYYYYYY!!
by SpankyMuffin October 20, 2008
A being that doesn't believe in any deity or deities.

A.K.A what you were when you were first born.
Me: Hey, do you wanna go to church tomorrow?
You: No thanks, I'm an atheist.
Me: An atheist? What's that?
You: Somebody that doesn't believe in any deities.
by mynameisjonas45@YouTube.com December 12, 2010
Stupid-ass high school and college students who think they know something about life in the real world.
- Cindy says she's an atheist.
- Oh, yeah? Let's ask lil-miss-know-it-all after she has her first pregnancy scare.

- Billy says he's an atheist.
- Really? Let's see how much of a fucking atheist he is when he's supporting an entire family on his income alone and gets fired.
by Spanks*n*Tickles August 24, 2006
An atheist is...
1. Someone who acknowledges science, evidence, and all things rational instead of pure faith in a deity or deities. Instead of relying on "The Lord" to improve their lives, an atheist would be the best he or she can be.

a. The relationship between Christians and Atheists:

Some Christians attempt to verbally attack or convert Atheists and vice versa. Both have their extremists and their everyday average joe citizens who do not intervene with the lives of the opposite.

The logical thing to do in a situation like this where some of both factions are at verbal war is to simply leave the opposite alone. The saying "If you have nothing good to say, don't say it" comes into play here.
1. Religious Guy: Please Lord bring back my lost kitten, Mr. Snuggles...
Atheist: Dude, Mr. Snuggles is gone?? C'mon lets look for him, I have a flashlight!
R.G: No, no, if I remain pious to the Lord Mr. Snuggles shall return on his own.
A: I'm sure he will...It's a shame...I'll miss that little furry guy..

2. Extremist R.G: REPENT OR BURN IN THE FIRES OF HELL NOW YE GODLESS SCUM!!
Extremist A: GTFO YOU BRAINWASHED TOOL!!

Average Joe R.G: Ah, time for Church.
Average Joe A: That's cool, wanna grab a burger afterwards and talk about some current events affecting our world?
Average Joe R.G: Sure, why not :)
by G42 The Truth November 07, 2008
To be without any religious beliefs.
I am an atheist. I don't believe in heaven, hell, spirits, or souls. I think of after-death as the same state as pre-birth. I have no creed, no rituals, no voices telling me to do crazy shit. Atheism is not a religion. Religious people like to call it one because their narrow minds can't imagine living without at least ONE delusion. If atheism was a religion then disbelief in Zeus would be a mythology, and clear would be a color.
by aslanmane December 23, 2010
Atheist-One who does not believe that God or gods exist. That's it. That's all there is to it. NEVER i mean fucking NEVER judge a whole group of people because of what some of them believe. Yes, some blindly condemn religion. Yes, some are just angry, angst-ridden teens. Yes, some say they don't believe but inside actually do. And yes, some are confused and don't know what to believe, or are just scared to. But some athiests actually CARE about the truth and have done research and personal reflection to come to a personal conclusion based on tons and tons of thought. Also, NEVER assume that you're right! No matter what you believe. Even if someone honestly believe something completely ridiculous to YOU, keep that to YOURSELF. Judging people BEFORE you really know them is parallel to racism, and people can NEVER be judged as a group. Some athiests are conceeded assholes who are so smug cause they believe they're right. But some athiests have considered the possiblities of higher powers and have actually TRIED to believe in greater enlightenment through God. I have my beliefs and that has NOTHING to do with my personality. I can have fun. I can use common sense and rationality. I think about consequences. I think about other people's feelings. I know that my reasons for this disbelief may offend you, so i KNOW that i have to keep them to myself unless asked to say why. People, you have YOUR beliefs of what you think is right. That doesn't mean you have to bring it upon other people, even if you THINK you're doing the right thing. Everyone has their reasons for thinking something, but someone's belief in their own personal TRUTH cant tell you who they are. Please, people respect each other. That's all the world needs. Respect and common sense.
Accept minor flaws, accept human imperfection, and accept people's identities. I'm not perfect. I KNOW there's a possibility that I'm wrong. Maybe some people just need to hear that.
Dude 1: Dude you coming to the party tonight?
Dude 2: Nah, sorry. Got church tomorrow.
1: Alright, man. Do whatcha gotta do.
2: Say you wanna come some time? Just so you can see what I beleive?
1: Sure, why not? I might be atheist, but who knows? Exploring the possibilities may find something that appeals to me more. It would be ignorant to just assume without personal thought that there is no higher power.
2: Glad to hear it.

(You see?! 2 people with completely different beliefs that can still be friends because they accept their PERSONALITIES over religion)
by Mi nombre no es importante. May 06, 2006
someone believing in no religion and or afterlife.
Because Susie was an atheist, she was not bothered by the other students chanting "Go to hell Susie! Go to hell!"
by Dr.Octillary April 08, 2011
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