1. extremely old or old-fashioned; outdated
2. belonging to the time before the biblical flood
Usage: biblical; historical

1. a very old or old-fashioned person

Examples

• His antediluvian computer finally broke down after twenty years.
• The professor’s teaching methods seemed antediluvian to his students.
• She refused to use the antediluvian filing system at work.
• The museum displayed antediluvian artifacts from ancient civilizations.
• My grandfather is such an antediluvian when it comes to technology.
• The company’s antediluvian policies needed urgent updating.
• He felt like an antediluvian among all the young employees.