noun
1.
a chronological error
anachronisms of several centuries mar some earlier chronicles
Synonyms: misdate, misdating, mistiming, parachronism
Related Word: antedate, anticipation, prochronism, prolepsis; postdate
2.
one that is inappropriately situated especially in time
born centuries too late, he was an anachronism in modern urban society
Synonyms: solecism
Related Word: faux pas, gaffe; defect, flaw, mistake, slip