Definition of "unclassify"

unclassify

verb
third-person singular simple present unclassifies, present participle unclassifying, simple past and past participle unclassified
1. To declassify.
  Quotations
  This is in response to your request for my official opinion concerning whether an appointing authority can unclassify a position for use exclusively by a second appointing authority.
  1986, Opinions of the Attorneys-General of the State of Georgia, page 82
  However, if both AFATDS and IFSAS are operating in the unclassified mode, IFSAS still must unclassify each message before sending it to AFATDS.
  2000, Field Artillery, page 37
  He claims they don't have anything to unclassify.
  2004, Neil Mavis, Deorbit the Space Shuttle: Stem Cell Rescue, page 152