'Fornication' in the Bible

"Lift up your eyes at [the] barren heights, and see where you have not been ravished. Beside the roads you sat for them like an Arab in the desert, and you have defiled [the] land with your fornication and with your wickedness.

And it was because of the frivolity of her fornication that she defiled the land and committed adultery with the stone and with the tree.