“Means that the Lord seals their exaltation upon them while they are yet in this life” (D&C Student Manual, p. 326). Mormons believe it happens to only a select few.
Dictionary of Mormonese
Make Your Calling and Election Sure
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.