declassify
🇺🇸
/diːˈklæsɪfaɪ/
🇬🇧
/diːˈklæsɪfaɪ/
To make something that was secret not secret anymore, especially by the government.
The government decided to declassify some old documents so that people could read them.
To change the level of importance or danger of something, like moving it to a lower category or removing it from a list.
The scientists decided to declassify the bird species because it was no longer in danger of extinction.