An idol is a representation of something in the heavens or on the earth. It is used in worship and is often worshiped. It is an abomination to God (Exodus 20:4). Idolatry is bowing down before such an idol in adoration, prayer, or worship. In a loose sense, idolatry does not necessitate a material image or a religious system. It can be anything that takes the place of God: a car, a job, money, a person, a desire, etc. Idolatry is denounced by God at the beginning of the Ten Commandments and is considered a form of spiritual fornication.