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1.
A militant atheist is one who is hostile towards religion. They differ from moderate atheists because they have the desire to propagate atheism and also hold religion to be harmful. Militant atheism was an integral part of the French Revolution, Soviet Union, Cultural Revolution, and is expresses itself today in the ideas of the New Atheist authors.
Militant atheist: All religion does is cause violence! Blah! Blah! Blah!

Believer or Agnostic: You're a militant atheist! What about all of the soup kitchens, hospitals, charities, and orphanages run by beleivers? Are you forgetting about that? Also, did you not take into consideration all the violence and persecution that occurred under the militant atheistic policies under the Soviet Union or Cultural Revolution?
by lovejd3 September 18, 2011
 
2.
An atheist who has become insufferably elitest. Unlike a majority of most atheists, he has decided that it is his duty to rid the world of all religion. Ironically, he never shuts up religion, putting him into the same level of irritation as most religious fundamentalists.
Man, I wish this debate with the militant atheist and the fundamentalist could go somewhere else.
by jbeast33 March 18, 2012
 
3.
According to paranoid Christians with a persecution complex, anyone who is openly an atheist and has the gall to express a desire for the same rights and privileges as any other group.
Atheist: I think that we atheists deserve the same rights and freedom of expression as any other group.
Christian: You're such a Militant Atheist.
by idiftw June 18, 2009
 
4.
Christians kill abortion doctors and reject condom use, encouraging the spread of AIDS. Muslims fly planes into buildings. Atheists write books and ask for evidence. Who's militant again?
Joe BibleThumper: "Those militant atheists are out of control. now they say that teaching science from our ancient book of magic contradictions is somehow bad for our intelligence."
by ubz June 07, 2010
 
5.
Often misunderstood, you will find that an Atheist is merely someone who does not believe in the existence of a deity or deities. The exact opposite of a theist.

Atheists can not be defined by any other terms. They do not follow any belief system or dogma. However, as in most cases in humans, people harboring similar ideas will share certain characteristics. Atheists typically abandon all things supernatural and rely on reason, rationality, evidence, and science as opposed to blind faith.

Militant Atheism is very much an oxymoron. For it is not used to define Atheists who take up arms to fight or kill believers in theism, but is actually used to define people who actively speak up about their ideas. In any other realm of discourse, it would be said that these people have a very strong opinion. But because it is not socially acceptable to criticize religion or religious beliefs, theists automatically turn on the defensive. At this point they find the need to label or demonize the opposition.
Whereas a fundamentalist or member of militant Islam would strike against the opposition with violence and tyranny, a "militant atheist" will fight the opposition with words and ideas.
by V4RI4BL3 March 04, 2007