Antonyms of noun declassification

1 sense of declassification

Sense 1
declassification -- (reduction or removal by the government of restrictions on a classified document or weapon)
       Antonym of classification (Sense 4)
      => classification -- (restriction imposed by the government on documents or weapons that are available only to certain authorized people)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun declassification

1 sense of declassification

Sense 1
declassification -- (reduction or removal by the government of restrictions on a classified document or weapon)
       => decrease, diminution, reduction, step-down -- (the act of decreasing or reducing something)