classified ad — Classified ads or classified advertisements are small advertisements in a newspaper or magazine. They are usually from a person or small company.
classified — Classified information or documents are officially secret.
hush-hush — highly secret or confidential: a hush-hush political investigation.
in secret — done, made, or conducted without the knowledge of others: secret negotiations.
under wraps — to enclose in something wound or folded about (often followed by up): She wrapped her head in a scarf.
