v.
Pronunciation: ( ˌ )d ē - ' kla-s ə - ˌ f ī
Function: transitive verb
Date: 1945
: to remove or reduce the security classification of < declassify a secret document>
– de · clas · si · fi · ca · tion \ ( ˌ )d ē - ˌ kla-s ə -f ə - ' k ā -sh ə n \ noun