Noun:
1: classified advertisement, classified, classified ad a short ad in a newspaper or magazine (usually in small print) and appearing along with other ads of the same type
Adjective:
1: sorted, categorised, grouped, categorized, classified arranged into classes
2: top-secret, confidential, sensitive, restricted, secret, eyes-only, classified official classification of information or documents; withheld from general circulation; "thousands of classified documents have now been declassified"