anachronism /əˈnakrəˌnizəm/ I. noun 1. a thing belonging or appropriate to a period other than that in which it exists, especially a thing that is conspicuously old-fashioned • everything was as it would have appeared in centuries past apart from one anachronism, a bright yellow construction crane. 2. an act of attributing a custom, event, or object to a period to which it does not belong. – origin mid 17th cent.: from Greek anakhronismos, from ana- ‘backward’ + khronos ‘time.’