classify
🇺🇸
/ˈklæsɪfaɪ/
🇬🇧
/ˈklæsɪfaɪ/
to sort things into groups based on how they are alike
Scientists classify animals into groups based on their features.
to decide what type or group something belongs to
Doctors classify this illness as very serious.
to mark information as official secret
The government will classify these documents to protect national security.