noun. voluntary sexual intercourse between persons not married to each other.
- free love
noun. extramarital sex that willfully and maliciously interferes with marriage relations.
- extramarital sex
- criminal conversation
Example sentences of the word fornication
1. Noun, singular or mass
Married men who had sex with a single woman were charged with fornication, while married women who had sex with a single man were charged with the more serious crime of adultery.