Anachronism

An anachronism (from the Greek ἀνά ana, "against" and χρόνος khronos, "time") is a chronological inconsistency in some arrangement, especially a juxtaposition of person(s), events, objects, or customs from different periods of time. The most common type of anachronism is an object misplaced in time, but it may be a verbal expression, a technology, a philosophical idea, a musical style, a material/textile, a plant or animal, a custom or anything else associated with a particular period in time so that it is incorrect to place it outside its proper temporal domain.

An anachronism may be either intentional or unintentional. Intentional anachronisms may be introduced into a literary or artistic work to help a contemporary audience engage more readily with a historical period. Anachronism can also be used for purposes of rhetoric, comedy, or shock. Unintentional anachronisms may occur when a writer, artist, or performer is unaware of differences in technology, customs, attitudes, or fashions between different historical eras.