Checkpoint wrote:
It seems to me it is seldom if ever specifically defined in scripture, although the term is used more than a few times.
Does it, for example, include polygamy?
How about sex before marriage?
Or homosexuality?
Adultery is a sin, but is it also fornication?
The JW is correct that fornication is 'illegal sexual intercourse' BUT incorrect in determining what is legal verses illegal. The has NEVER been a law against pre-marital sex in Yah's law.
There are laws against sexual worship, prostitution, rape, homosexuality, taking another man's wife or betrothed (adultery), taking a girls virginity without marrying her. There are also the laws against incest and bestiality.
If you were betrothed, you could legally have sex. The betrothal was the beginning of the covenant. It was up to the couple when to start a sexual relationship.
If a girl was not a virgin, she could get involved in a sexual relationship with any man but had to limit herself to one man as a concubine to that man. A concubine was a sexual partner that was not a wife. She had a lesser status and didn't produce heirs unless the father made him so. The man was still responsible for the children she had.
Jacob had two wives and two concubines but made all 12 sons equal as heirs.
Adultery is a subset of fornication. Adultery of a man was having sex with another man's wife or betrothed. It had nothing to do with his own marital status. It was NOT cheating on his wife. That is a more modern concept of adultery that is not biblical. A man could have multiple wives and concubines. Adultery of a woman was having sex with anyone other then the man she was married to or involved with as a concubine. Women were never to have more then one sexual partner at a time so any child she conceived would have a known father to be responsible for that child.
Now there were also the Levirate laws. A childless widow could require a child by the same bloodline as her husband to provide an heir of that bloodline to inherit her dead husbands inheritance or property. The wife didn't get it when he died. It belongs to his family but if she had a child of that family, that child could gain that property and a the mother would be his regent until he was legally a man and then he had to maintain his mother. If she remarried a man of any other bloodline, she could not gain her dead husband's property. So in the case of a Levirite widow, she could have sex with men of the family of her dead husband for the sake of a child but it was not a marriage. She didn't have the same rights as the primary wife of that man.
It is phariseeism to follow that any pre-marital sexual contact is fornication. That is expanding on the actual definition with the traditions of man. It is fine to have a higher standard but you don't have the right to force others to that higher standard or equate it as sin for those that reject those traditions of man.
The 'playing the whore' references in the OT are women that got involved with the sexual worship of the groves. It was random sex with strangers just for fun and had nothing to do with a relationship and was with multiple partners.
The modern day equivalent of that type behavior is having 'one night stands'. You don't pick up strangers for sex. That type of sex was illegal.
As long as your in a relationship and the woman isn't married or betrothed to another man, its not fornication by biblical law.