Full Definition of oracle
1a : A person (as a priestess of ancient Greece) through whom a deity is believed to speakb : A shrine in which a deity reveals hidden knowledge or the divine purpose through such a personc : An answer or decision given by an oracle
2a : A person giving wise or authoritative decisions or opinionsb : An authoritative or wise expression or answer
The term may also be used to mean the response that is given via such a medium. Such a response if frequently takes the form of an allegory or enigmatic statement.
An oracle may also be used in the general sense to refer to a person who is thought to be a person of wise counsel or one of prophetic opinions. It could mean a prediction; or a wise or an authoritative statement. It may refer to a command or revelation that comes from God. In terms of the Bible, it refers to the sanctuary of the Temple.