A tautology is a thing which is tautological.
A tautological tautology.
by unixclan.net August 10, 2006
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A logical statement in which the conclusion is equivalent to the premise
Example of a tautology: Bad people take drugs; therefore, people who take drugs are bad.
The other definition appearing here, "Unnecessary repetition of a word", is a crudification and wrong - such pointless reiterative repetition is a redundancy, and one who makes such a definition is called a "redundunce". Consult Fowler.
by Slick Willy March 16, 2005
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the explanation of a word by using the word itself.
What is a tautology?
a tautology.
by stickywulf October 24, 2005
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A tautology is a reiteration of a term using one or more different successive synonyms.
Examples of tautology:

It was a wet rainy day with lots of precipitation.
She is a female woman of the opposite sex, John.
We could see some dilapidated ruins.
by Fearman December 3, 2007
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Tautology club is a club based on tautologies.
All statements at tautology club must necessarily be true because they are tautologies.
Rules of Tautology Club:
1. The first rule of tautology club is the first rule of tautology club.
2. The second rule of tautology club is not the first rule of tautology club.
3. If this is your first night at tautology club, you have never been here before.
by L Quag February 17, 2010
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1) An obsessive facination with deceased tortoises.

2) An erotic attraction to or the need to copulate with deceased tortoises.

Etymology:

Normally enjoyed by the lesser active and unfit of the human species, due to the fact that a dead tortoise will not say no or crawl away and thus irradicates the fear of rejection.
1) Look a dead tortoise--lets partake in the act of Necro-Tautology!
- You sick fuck, leave it alone

2) People have said that I am a tortaulogist.
- Dude you hump tortoises?
by Grey M@a September 10, 2004
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