Declassification (noun)

1. The act of removing or reversing the classification of information that was previously considered confidential or classified.
2. The process of removing or lifting the restrictions on access to information that was once considered sensitive.

Origin:

From the prefix de-, meaning reversal, and the word classification, meaning the act of arranging or organizing into categories.

Examples:

1. The declassification of the documents was a victory for government transparency advocates.
2. The declassification process can take years, as sensitive information must be carefully reviewed and redacted.
3. The declassification of the files provided new insights into the activities of the intelligence agencies.
4. The declassification of the report sparked controversy and heated debate among lawmakers and the public.
5. The declassification of the previously secret information was a major milestone in the peace process.