fornication

1. (religion, law) Sexual intercourse by people who are not married to each other, or which is considered illicit in another way.Examples: "FRIAR BARNARDINE. Thou hast committed— BARABAS. Fornication: but that was in another country; And besides, the wench is dead."; "I am the sister of one Claudio, Condemned upon the act of fornication To lose his head, condemned by Angelo"; "Now the works of the flesh are manifest, which are these; Adultery, fornication, uncleanness, lasciviousness, Idolatry, witchcraft, hatred, variance, emulations, wrath, strife, seditions, heresies, Envyings, murders, drunkenness, revellings, and such like: of the which I tell you before, as I have also told you in time past, that they which do such things shall not inherit the kingdom of God."countableuncountable

2. (colloquial) Sexual intercourse in general; sex.Examples: "For a moment he stared at the back of the Lascar, wondering if he were the youth that he had disturbed during fornication with his Engineer, then dismissed all thoughts of the previous night, he was getting old, and suspicious, what did it matter […]"colloquialcountableuncountable