1. something that is not in its correct historical or chronological time, especially something that belongs to an earlier time
2. a person or thing that seems to belong to the past and not to fit in the present

Examples

• The movie contained several anachronisms, including a wristwatch worn by a medieval knight.
• Using a typewriter in today’s digital world seems like an anachronism.
• The film’s biggest anachronism was showing Vikings wearing horned helmets.
• His formal, old-fashioned manners made him seem like an anachronism at the casual party.
• The antique telephone in the modern office was a charming anachronism.
• Shakespeare’s plays contain many anachronisms, such as clocks in ancient Rome.
• In an age of smartphones, payphones have become anachronisms.