Definitionssexual intercourse, as between a spouse and an unmarried person or between two married persons who are not married to each other.
3. To engage in indiscrimitate and/or promiscuous sex.
Etymology: First recorded in Middle English about 1300. From the Latin fornax , meaning oven, kiln or fumace, and from fornix, meaning arch, vault or vaulted room, from the shape of Roman ovens, later the arched underground vaults of Rome, and finally a brothel, because the Roman vaults were used by poor, unskilled prostitutes.
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