What does fornicator mean?
A fornicator is a person who engages in sexual intercourse outside of marriage — traditionally, an unmarried person who commits what many religions classify as the sin of fornication. The noun derives from the verb 'fornicate', which entered English from Late Latin 'fornicare', meaning to have illicit intercourse, itself linked to 'fornix', the Latin word for an arch or vaulted space under which prostitutes once worked in ancient Rome. Today 'fornicator' sounds distinctly old-fashioned: it survives mainly in sermons, historical accounts, classic literature, and legal discussions of older statutes such as those against 'fornication and adultery'. Because it encodes strong moral and religious condemnation of premarital sex, using it about a person sounds harsh and judgmental by contemporary standards. A female fornicator may be called a 'fornicatrix', though this form is rare.
nounA person who engages in sexual intercourse outside of marriage, especially considered as a matter of moral or religious censure.
- A person who engages in sexual intercourse without being married; one who commits fornication.
"The old sermon thundered against the fornicator, warning of divine judgment."
"The preacher condemned the fornicator in the harshest terms."
"In the novel's Puritan setting, a woman accused of being a fornicator faced public shame."
Standard regular plural; used when referring to multiple people guilty of fornication.
"The statute listed penalties for adulterers and fornicators alike."
The word traces back to the Latin 'fornix' — an arch or vault — because Roman prostitutes plied their trade under the arches of the city.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of fornicator
The word comes from Late Latin 'fornicare', meaning to have sexual intercourse outside marriage, which derives from 'fornix', Latin for an arch or vault — a reference to the vaulted spaces in Roman cities where prostitutes worked. The term passed into medieval Church Latin before entering English around the early modern period, alongside its cognates 'fornicate' and 'fornication'. It shares this Latin root with words like 'fornical', relating to arches or vaults.
Related word forms
How fornicator is actually used
The word is formal and archaic-sounding today, used almost exclusively in religious, legal-historical, or literary contexts. It carries strong moral disapproval rooted in Christian teaching and can sound judgmental or offensive in ordinary conversation.
Easily confused with fornicator
An adulterer has sex with someone while married to another person, whereas a fornicator is unmarried or engages in sex outside marriage generally.