Literally, agnostic means "without knowledge". Agnostic usually refers to those that claim agnosticism.

Generally, agnosticism is the view in which it is unknown or unknowable whether supernatural forces, such as gods and other deities, are at work. Most agnostics will neither claim that God or gods exist nor will they claim that they do not exist.

Answer:

I agree with above, agnosticism is neither the refusal or belief in a God, but rather a belief that either or is a possibility.

A person who rejects the existence of any God is an Atheist.

A person who is ignorant of the God of Abraham is a heathen.

A person who worships other Gods is a pagan.

A person who doesn't believe in god at all is called an athiest (a- without, theism-beliefs on god).

However, there are also agnostics, people who believe god MIGHT exist, but haven't reached a conclusion.

The above answer is inadequate due to the fact that it is written in only Christian terms (i.e. "heathen" and "pagan"). The question is about the belief in the concept of God in general, not the Christian interpretation. To identify a follower of any religion that worships a god (or gods) other than the God of Abraham as "pagan" is to lump a vast array of diverse beliefs into one category; basically, you're saying that to have religion, you are either Christian or "other."

The simple answer to the question is this: If you believe that there is no god, you are an athiest. If you believe in the possibility of a god but do not believe that humans are capable of knowing for sure, you are an agnostic.
If you're refering to God as the deity in Christianity, then both atheists and agnostics fit in this category.

An Atheist denies the existence of a supreme being.

An Agnostic is someone who believes that there might be a God, but this and the essential nature of things are designed to be unknown.
An atheist is the opposite of a theist.

The theist believes there is evidence for the existence of their favorite god.

The atheist does not.

It would be illogical for the atheist to "deny" the existence of something for which there is no evidence. Atheism is merely the lack of a belief.

Knowledge is absolute. Since nobody can know with absolute certainty no gods exist, everyone is agnostic. So the so-called "agnostic" has the same lack of knowledge as the atheist or theist has. It's just commonly accepted that an agnostic does not commit either way.
Atheist: The conviction that there is definitely no God.

Agnostic: The belief that one cannot know for sure if there really is a God.

Non-theist: Indifference to the subject of God, or one who can't be bothered to think about whether or not God exists.

someone who does not believe in God is not necessarily an atheist, because there are many other religions that he or she may belong to, although these generally will have a God or gods as part of their system, with the possible exception of Buddhism. But, someone who does not believe in any God or gods at all, is an atheist.
Someone who doesn't believe in gods is called an atheist.

A:2

If you don't believe in any kind of God, you are an atheist. If you believe in some kind of omnipotent deity but do not believe that man has any way of knowing the nature of this being, you are an agnostic.

Atheism is not a unified system of belief and as such the views on sexuality vary from atheist to atheist. Most atheists would say they believe in Evolution and so humans have evolved with sexuality for reproduction, the pleasure being a side effect to make the urge to seek out a mate desirable. As for ethics in sexuality these vary. But the individual thoughts about everything else regarding sex (sex without commitment, homosexuality, abortion) vary.

I believe the "rules" say that offspring must be bought up in the Catholic faith; in practice I'm sure it happens all the time! I recall a priest being interviewed who said that when he discussed faith with parishioners there was an unsaid feeling that the parishioner didn't want to admit how little he believed in the doctrine and the priest equally didn't want say how little he believed. So I imagine that there are many weddings in church where none of the main protaganists reallybelieve.

Answer:

My fiance is Catholic, and I'm Agnostic. We are both aware that there may be trouble for us if we try to marry in the Catholic church, as they are very strict with their guidelines in requiring that practicing Catholics must marry someone in the faith. This is why we are choosing to marry with a Justice of Peace, less hassle.

Thoughtful, firm (about belief).

Answer:

There are no special characteristics of an agnostic except for his opinion that he (or she) does not know enough about god(s) to take firm position on their existence. Even this criteria can vary from "doesn't know and is searching for an aswer" to "doesn't know and doesn't care because the answer is unimportant"

An agnostic feels that humans are not equiped to know the truth in matters such as God and the future life with which Christianity and other religions are concerned. Or, if not impossible, at least impossible at the present time. Whether or not there is a deity, there is no way to know anything about her/him.

Agnostics don't know if there is a God, or gods, or any higher power at all, and they also don't think it can be disproven/proven that there is one. Most don't really care.

Agnosticism is a coherent and reasoned position and it is not the position of people who may be experiencing a crisis of faith. It is natural even for strong believers among the people of faith to sometimes experience doubts. Agnostics are not people who are experiencing pangs of doubt or confusion. They are not 'on the fence' as some characterize them, since they appear to be somewhere between faith and atheism.

In general, virtually all western religions and some eastern religions as well have fundamentalist underpinnings that involve certainty regarding some basic questions. This positional certainty is based on divine revelation. There is certainty in the existence of a deity, and about the purpose and methods of the deity. There is usually certainty about the fate of nonbelievers, and about how to become one of those who will experience heaven after death. There is also certainty about what groups or individuals are hated by the deity and will eventually be brought to doom. These convictions cannot be directly and convincingly connected to any form of physical evidence. It is in the very nature of faith that convictions are held even though the object of faith is hoped for and unseen. Faith is absolute belief in the complete absence of evidence.

On the other hand, atheists are those who claim the same level of certainty held by people of faith, but their certainty is that there is no deity.

Perhaps some atheists don't realize that their certainty puts them in league with those who claim a metaphysical connection, certainty in the complete absence of evidence, that is itself a possible argument in favor of the divine. On the one hand is faith given by the deity that leads to salvation, and on the other is the faith, different in form only and not substance, that no such deity exists. What is the source of such faith? Certainty of this kind cannot come from reason alone, or from physical evidence. Recall the debate over proving that there are NO WMD's in Iraq. "Give me the hard evidence that there are NO WMD's in Iraq!"... What?... The only thing that can be proven is that there ARE WMD's, if indeed there are.

The heart of the dilemma is the nature of knowledge and of certainty. For those who have received saving faith, the reality, experience or 'sensorium' of the spiritual and metaphysical is as undeniable as dirt. For those who have yet to receive such faith, like myself, the spiritual and metaphysical claims of people of faith appear indistinguishable from fantasy, myth or madness. The Greek scriptures talk about this. The things that are spiritually discerned are foolishness to the unbeliever. No argument from me on that point.

So I conclude that it is as foolish to claim certainty that people of faith are completely wrong as it is to believe their teachings. It matters little to me whether I am considered an agnostic or an atheist. What is more important is to wonder about what can be known, and to what extent can we be certain of it.

Perhaps the difference between agnostics and atheists comes down to the approach to spiritual and metaphysical realms, the realms of theology and some philosophy. In the absence of evidence, and knowing that I do not have the faith that people of faith are supposed to possess, I can only conclude that spirituality and metaphysics are largely unknown and currently unknowable, and probably result from the neurological entropy that comes along with our overpowered brains. I cannot conclude with certainty that those realms are completely unreal. I can hold these beliefs without a single urge to force believers or atheists to come around to my way of thinking.

An agnostic is a person who does not know whether or not there is a supreme being - a god - who controls the universe.

The Greek word "gnōstós" means "known: the prefix "a-" means "not". So "agnostic" means "not known", and in generally means "a person who does not know" - and in some cases, "a person who does not care". The word agnostic generally refers to a supreme being, but is sometimes used in technology; a program that is "platform-agnostic" doesn't care what kind of computer it is running on.