Information which pertains to the affairs of a country and access to which is restricted by the government.

A club, fraternal organization, or other association which admits only selected individuals as members, whose meetings and practices are often ritualistic and not public, and which often has the purpose of furthering the social or economic opportunities of its members.

A retail marketer of women's clothing and beauty products, best known for lingerie, founded in San Francisco in 1977.

A governmental agency that deals with espionage and other acts of secrecy.

Information that is widely known, but not acknowledged openly. / (dated) Information that is not widely known, despite being freely available.

Having one of the highest secrecy classifications, "top secret".

The voting system involving ballots available only at official polling places, prepared at public expense, containing the names of all candidates, and marked in secret at the polling places.

A police force operating in secrecy and outside the normal boundaries of law and hidden from the public, usually in support of a totalitarian government's political policies to suppress political dissent through the use of methods including intimidation, violence, and surveillance.

One who admires another romantically but purposely remains anonymous to the extent that the subject of the admiration is unaware of the admirer's identity.

A secret that is classed as "top secret"; a top-secret secret; top-secret information. / Used other than figuratively or idiomatically: see top, secret.