Antonyms of verb classify

1 of 3 senses of classify

Sense 2
classify -- (declare unavailable, as for security reasons; "Classify these documents")
       Antonym of declassify (Sense 1)
      => declassify -- (lift the restriction on and make available again; "reclassify the documents")

Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb classify

3 senses of classify

Sense 1
classify, class, sort, assort, sort out, separate -- (arrange or order by classes or categories; "How would you classify these pottery shards--are they prehistoric?")
       => categorize, categorise -- (place into or assign to a category; "Children learn early on to categorize")

Sense 2
classify -- (declare unavailable, as for security reasons; "Classify these documents")
       => restrict -- (place under restrictions; limit access to; "This substance is controlled")

Sense 3
relegate, classify -- (assign to a class or kind; "How should algae be classified?"; "People argue about how to relegate certain mushrooms")
       => assign, attribute -- (decide as to where something belongs in a scheme; "The biologist assigned the mushroom to the proper class")