Catholic Encyclopedia: Prophecy
- Defines prophecy in the strict sense as the revelation of future events. Also notes that in Scripture prophecy is related to the gift of knowledge and sometimes is used to refer to divine inspiration concerning any secret.
- http://www.newadvent.org/cathen/12473a.htm

Believe Religious Information Source
- Definitions of Biblical prophets and prophecy with related issues and explanation.
- http://www.mb-soft.com/believe/txo/prophet.htm