fornication

noun2

1. •
   (disapproving) Sexual intercourse by people who are not married to each other, or which is considered illicit in another way.

   • FRIAR BARNARDINE. Thou hast committed— BARABAS. Fornication: but that was in another country; And besides, the wench is dead. — 1589
2. •
   (informal) Sexual intercourse in general; sex.