Eternal damnation is the opposite of eternal life, and all those who do not gain eternal life, or exaltation in the highest heaven within the celestial kingdom, are partakers of eternal damnation. Their eternal condemnation is to have limitations imposed upon them so that they cannot progress to the state of godhood and gain a fulness of all things.
They “remain separately and singly, without exaltation, . . . to all eternity; and from henceforth are not gods, but are angels of God forever and ever. (D&C 131:4) Spirit children are denied to them to all eternity, and they inherit “the deaths,” meaning an absence of posterity in the resurrection. (D&C 132:16-25)
They are never redeemed from their spiritual fall and taken back into the full presence and glory of God. Only the obedient are “raised in immortality unto eternal life.” The disobedient, “they that believe not,” are raised in immortality “unto eternal damnation; for they cannot be redeemed from their spiritual fall, because they repent not.” (D&C 29:42-44) (Bruce R. McConkie, Mormon Doctrine, p. 234) — Doctrine and Covenants Student Manual, p. 37