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29.
A free encyclopedia where average people can make an account and rant with false information about people or things that they hate, and naive Americans will pass it as truth because they're too lazy to look for a more reliable source.
"I learned on Wikipedia that Austin Winkler of the rock band Hinder was gay! Wikipedia is a reliable source, so it must be true!"

"My school has an article on Wikipedia. It's North Adams High School, located in Seaman, Ohio. The principal is Mr. Waffle and the vice principal is Mr. Horny."

"According the the intellectual source of Wikipedia, Adolf Hitler died by being attacked by a bear. I always thought it was something along the lines of committing suicide while in hiding, but who am I to criticize the wisdom of Wikipedia?"
by hekifier March 28, 2009
 
1.
Savior of high school students everywhere
Example? Pretty much every paper I've decided to hand in.
by AnWa February 27, 2005
 
2.
A project to create the most accurate and complete free-content encyclopedia on the Internet. Written as a collaboration of users across the Internet. Basically, the UrbanDictionary.com version of an encyclopedia, without the witless comments.
An article on Wikipedia helped me write my Astronomy paper.
by Steven January 01, 2004
 
3.
The place where you go when the word you're looking for is too sophisticated to be found on UrbanDictionary.
I found the definition for "Antidisestablishmentarianism" on Wikipedia.
by FinnishPunk July 11, 2004
 
4.
A free online encyclopedia that knows EVERYTHING. I mean EVERYTHING. IT knows ALL.
There isn't anything that wikipedia doesn't know
by Prince Leviticus November 12, 2004
 
5.
The world's largest forum for anonymous arguments. Argue with everyone in the world on any topic imaginable. You may be Stephen Hawking, so-called "expert", but you need to reconcile your views on black holes with Bob from Idaho who thinks they are portals to Narnia and find some neutral point of view that you can both agree on.
I wanted to find a place to argue about Bruce Jenner's Wheaties boxes and found Wikipedia.
by Cunningest Linguist May 07, 2006
 
6.
Internet-based free content encyclopedia that provides entries submitted by regular Internet users, thus covering topics and issues more often ignored by the scholarly print-based encyclopedias. Not everything can be submitted, and there are policies and guidelines that must be followed. Is a distant relative to urbandictionary.com in that they are both free content Internet databases.
Wikipedia has an extensive listing of every major Harry Potter character. Even Luna gets a good-sized entry.
by Paul Wartenberg January 06, 2004
 
7.
Britannica on the bathroom wall.
"I didn't know Mr. Siegenthaler killed JFK. Thanks, Wikipedia!"
by Limecat Never Forget October 28, 2006