| 1. | an international syndicate, combine, or trust formed esp. to regulate prices and output in some field of business. |
| 2. | a coalition of political or special-interest groups having a common cause, as to encourage the passage of a certain law. |
| 3. | a written agreement between belligerents, esp. for the exchange of prisoners. |
| 4. | a written challenge to a duel. |

An association in which producers of a similar or identical product try to obtain a monopoly over the sale of the product.
Note: The Organization of Petroleum Exporting Countries (OPEC) is a cartel.
Cartel
A small group of producers of a good or service who agree to regulate supply in an effort to control or manipulate prices.
Investopedia Commentary
The best known example of a cartel is probably the Organization of Petroleum Exporting Countries (OPEC).
Related Links
Antitrust Defined
Getting A Grip On The Cost Of Gas
See also: Antitrust, Oligopoly, Organization of Petroleum Exporting Countries - OPEC, Price Fixing, Supply
cartel