- 1classify something to arrange things in groups according to features that they have in common The books in the library are classified according to subject. Patients are classified into three categories. All rural settlements were classified according to their size. people classified by ethnic group These can be classified under five headings.
- 2classify somebody/something as something to decide which type or group someone or something belongs to Only eleven of these accidents were classified as major. Would you classify it as a hard drug or a soft drug?
- 3classify something to make documents or information officially secret or available only to people with special authority Government officials classified 6.3 million documents in 2008.
NAmE//ˈklæsəˌfaɪ//Verb Forms present simple I / you / we / they classify
he / she / it classifies
past simple classified
-ing form classifying