To have sex, but before marriage. If you are married, then it's just pain sex. If you are married, see fuck.
If you are religious, fornicating can be against one of your beliefs.
by Joey Blanchette May 17, 2005
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The definition above is WRONG: a fornicator is someone who has sex outside of marriage.

If you are having sex with someone who isn't your husband/wife then you are a fornicator

Fornication has damaged society in many different ways, but most people are too spiritually blind to see it!
All of my peers are fornicators. They have rejected God and seek pleasure rather than God!
by MeMyselfAndI July 7, 2004
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When you bone the bejesus out of someone.
Me and your old lady fornicated all night long while you were at work.
by nonimac November 30, 2007
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Fuck it Im gonna fornicate. I rather lose my virginity to fornication rather than being married then losing virginity.
by One little hellian November 8, 2017
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To procreate, have sex, engage in coitus, etc.

Very akin to fuck

see also copulate
In court, on the witness stand

Prosecution: What led you to beleive the defendant was violent?

Witness: The defendant smashed up my car and told me to fornicate myself.
by Joe Slang December 29, 2004
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To have sex. Once used in formal speech a long time ago.
Claudius snuck over the wall so he could fornicate with his neighbor's wife.
by AYB April 2, 2003
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