late 14c., from Latin transfigurationem (nominative transfiguratio) "a change of form," noun of action from past participle stem of transfigurare (see transfigure). In English, originally "the change in appearance of Christ before his disciples" (Matt. xvii:2; Mark ix:2,3). The non-Christian sense is first recorded 1540s.[transfiguration etymology, transfiguration origin, 英语词源]