IPA: /nɒnˈklæsɪfaɪd/
KK: /nɑnˈklæsɪfaɪd/
Not organized into categories or groups; not classified.
The information was kept nonclassified to ensure transparency.
Nonclassified → It is formed from "non-" (meaning not) and "classified" (from Latin "classificare", meaning to arrange into classes). The word "nonclassified" means not arranged into classes or categories.
Think of 'non-' meaning 'not' and 'classified' meaning 'arranged into classes' — so nonclassified refers to something that is not organized into specific categories.