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3.
One who forms their beliefs based on reason and science, and not on religion, authority, or tradition.

Despite what the term actually means, it is used by condescending people to describe themselves.

The irony of people who refer to themselves as freethinkers is that even though they believe they formed their opinions solely on reason and science, modern psychology disproves that people are capable of that.
Lindsay says she is a freethinker. However, her cognitive biases make that impossible.
by Commonsense September 04, 2012
 
1.
An individual whose opinions are formed on the basis of an understanding and rejection of tradition, authority or established belief.
Sarah did not believe that her friend Tom was going to hell just because he had a boyfriend. She was as a free thinker.
by Mago Chutney May 25, 2006
 
2.
A philosophical viewpoint that opinions or beliefs of reality should be based on science, logic and reason. Ideas should not be derived from religion, authority, governments or dogmas.
A free thinker should not reject nor accept any proposed truths of organized religion, established norms, media, etc. They should determine if the belief is valid based on their own knowledge, intuition, research and reason. Just because other people believe in it, doesn't mean it's right! Use your own judgment and think critically!
by Autumn's Modesty September 19, 2009
 
4.
A follower of the freethought movement. Not to be confused with a free thinker.
"A believer is a bird in a cage, a Freethinker is an eagle parting the clouds with tireless wing"
-- Robert Green Ingersoll (1833 - 1899)
by JoeBloggs April 10, 2005
 
5.
A person whose only believe is science and not god. Some freethinkers believe that god has abandoned us for a long time ago.
God doesn't exist. The bible said nothing about dinosaurs and that the earth was flat.
by Anonymous January 03, 2005
 
6.
Years of misuse has reduced the term to a self-branded label for pretentious adolescents who have only just realized that the universe isn't what their parents/guardians lead them to believe like most rational individuals who reach this epiphany at the age of 6 but for lack of better word and/or urge to sound like pretentious adolescents who have only just realized that the universe isn't what their parents/guardians lead them to believe is used to describe anything from the classical definition of open-mindedness to being-like-the-rest-of-us-who-are-different-to-you.
a: "What religion are you?"
b: "I'm a free thinker"
a: "What?"
b: "I'm not really sure whether god exists"
a: "So you're agnostic?"
b: "No, I'm a free thinker"
a: "That's a little vague; you could be a free thinking atheist or free thinking agnostic but saying free thinker doesn't tell anyone what you believe in"
b: "But I'm a free thinker"
a: "Do you even know what that means?"
b: "My friends are free thinkers"
by nev_ February 20, 2011
 
7.
A person between the ages of 18 and 30 who lives in the artsy parts of major cities. They ride bicycles everywhere and are known for protesting.
I was late to the meeting because of the freethinkers in the road ontheir bikes.
by zak000001 June 12, 2009