legalization

US /ˌliː.ɡəl.əˈzeɪ.ʃən/
UK /ˌliː.ɡəl.əˈzeɪ.ʃən/
"legalization" picture
1.

the act or process of making something that was previously illegal permissible by law

:
The legalization of cannabis has been a controversial topic.
They are pushing for the legalization of same-sex marriage.