Heavenly Father’s spirit child who proposed an alternate plan of salvation. After Heavenly Father rejected it, Satan rebelled. Heavenly Father sent him, along with his followers (demons), to outer darkness. They lost forever their chance to obtain physical bodies and to continue their progression to godhood. For many Mormons, Satan is the spiritual being whose presence they are most aware of.
Dictionary of "Mormonese"
Stop talking past each other. Gain a better understanding of the words that are unique to Mormonism and the differences of shared terms between Mormonism and Christianity.