I found this on the eom.byu.edu website:
Author: Holzapfel, Richard Neitzel
"Damnation" is a term derived from the Latin damnum, meaning "injury" and "loss," and often connotes deprivation of what should have been possessed. Just as there are varying degrees and types of salvation, coupled with eternal progression in some areas (D&C 76:96-98;131:1-4), so are there varying degrees and types of damnation. In LDS doctrine, to be damned means to be stopped, blocked, or limited in one's progress. Individuals are damned whenever they are prevented from reaching their full potential as children of God. Damnation is falling short of what one might have enjoyed if one had received and been faithful to the whole law of the gospel. In this sense, all who do not achieve the highest degree of the Celestial Kingdom are damned, even though they are saved in some degree of glory. They are damned in the sense that they will not enjoy an eternal increase or the continuation of the family unit in eternity (D&C 132:4, 19). In this context, damnation does not necessarily refer to eternal suffering in hell with the devil, for loss of blessings is in itself a type of hell and damnation. LDS perspectives on this subject include biblical scriptures enriched and clarified by additional revelation; hence, damnation has a wider application than may seem apparent in modern usage (see Degrees of Glory; Exaltation; Heirs)."