tautology 

Unnecessary repetition of a word.

HIV virus
PIN number

tautology by Verity November 10, 2004

tautology 

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.

tautology by Slick Willy March 16, 2005

tautology 

the explanation of a word by using the word itself.

What is a tautology?
a tautology.

tautology by stickywulf November 5, 2005

tautology 

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.

tautology by Fearman December 30, 2007

tautology club 

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.

tautology club by L Quag February 17, 2010

Necro-Tautology 

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?

Necro-Tautology by Grey M@a September 10, 2004

The Cosby Tautology 

Cosby drugged you or Cosby didn't drug you. Either way your ass hurts and your underwear are on backward for some reason.

or

Cosby will absolutely drug you...

Don't accept that drink man... that man has the Cosby tautology in his eyes.

The Cosby Tautology by bingobango_22 January 13, 2023