waybackmachine
nounUK /ˈweɪbæk məˌʃiːn/
US /ˈweɪbæk məˌʃin/
A website that saves old copies of web pages so you can see what they looked like before.
I used the Wayback Machine to find my school's old website from 2005.
OTHER MEANINGS
2. A time-travel machine in stories that takes people to the past.
In the cartoon, the hero built a wayback machine to visit the dinosaurs.
3. Any tool or method that helps you look at things from an earlier time.
Old photo albums are like a wayback machine for your family's memories.
4. The Internet Archive's specific service for browsing saved versions of websites.
The Wayback Machine showed me how the news site looked on its first day.