The definition of prophecy is simple. Prophecy is speaking the mind and heart of God as revealed by the Holy Spirit. Prophecy is the outflow of the heart and the very nature of God. Revelation 19:10 says that the testimony of Jesus is the spirit of prophecy. Jesus cares about His Church and therefore, has things He wants to communicate to His Church. Those communications come by way of the Holy Spirit. That is prophecy. It is what Jesus is saying to His Church.