DECLASSIFICATION Meaning of DECLASSIFICATION in English declassification BrE AmE ˌdiː ˌklæs ɪf ɪ ˈkeɪʃ ə n •ˌ•-, -əf ɪˈ•-, § \ -əˈ•• Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012