trade that is in violation of restrictions, rationing, or price controls / the people who engage in such trade (considered as a group), or that sector of the economy

A town that has a traditional right to hold a regular market.

A specialized form of marketing where an advertiser seeks to advertise or sell products or services through an affiliate network.

(Britain, dated) someone who was opposed to Britain joining the "Common Market" (European Union)

(marketing) The systematic collection and evaluation of data regarding customers' preferences for actual and potential products and services.

(finance) A market for trading short-term debt instruments, such as treasury bills, commercial paper, bankers' acceptances, and certificates of deposit.

(idiomatic) something which is overabundant at the moment and thus not in demand.

A market where meat is sold. / (colloquial, idiomatic) A place where one goes for a casual sexual encounter, such as a bar (establishment) or night club.

(economics) Any market in which trade is unregulated by government; an economic system free from government intervention.

(business) The buying and selling of goods through distribution channels other than those authorized or intended by the manufacturer or producer.