behind the times
01
(of a person) not keeping up with current trends, ideas, or advancements
Disapproving
Idiom
例
My grandfather is behind the times when it comes to using the internet.
02
(of a thing) outdated or no longer relevant to current trends or technology
Idiom
Informal例
His insistence on using a typewriter instead of a computer highlights how he is behind the times in terms of technology.
