declassification

WordReference Random House Learner's Dictionary of American English © 2026

de•clas•si•fy /diˈklæsəˌfaɪ/   v. [ ~ + obj], -fied, -fy•ing. 

1. to remove the security classification from (information, a document, etc.):
   Now that the files are declassified you can read for yourself.

WordReference Random House Unabridged Dictionary of American English © 2026

de•clas•si•fy  (dē klas′ə fī′), v.t., -fied, -fy•ing. 

1. to remove the classification from (information, a document, etc.) that restricts access in terms of secrecy, confidentiality, etc. Cf. classification (def. 5).

• 1860–65; de- + classify

de•clas′si•fi′a•ble, adj. 
de•clas•si•fi•ca•tion  (dē klas′ə fi kā′shən), n.