Source : Webster's Revised Unabridged Dictionary (1913)

Anachronism \An*ach"ro*nism\, n. [Gr. ?, fr. ? to refer to a
   wrong time, to confound times; ? + ? time: cf. F.
   anachronisme.]
   A misplacing or error in the order of time; an error in
   chronology by which events are misplaced in regard to each
   other, esp. one by which an event is placed too early;
   falsification of chronological relation.

Source : WordNet®

anachronism
     n 1: something located at a time when it could not have existed
          or occurred [syn: {mistiming}, {misdating}]
     2: an artifact that belongs to another time
     3: a person who seems to be displaced in time; who belongs to
        another age