early 15c. "admission to Heaven, exaltation" (theological), from Late Latin glorificationem (nominative glorificatio), noun of action from past participle stem of glorificare "to glorify" (see glorify). General sense by mid-19c. Also in 15c. as a term in alchemy, "action of refining; state of being refined." Gloriation "praising" is from c. 1400.