Moˌnopolies and ˈMergers Comˌmission, the BrE AmE
a former British government organisation whose job was to examine cases where two companies plan to ↑ merge (=join together to form a larger company) , and to decide whether this would be bad for other businesses and for ordinary customers. If the government thought there might be a problem, the case was ‘referred to the Monopolies and Mergers Commission’. In 1999 the organisaton was replaced by the Competition Commission. There is a similar organisation in the US called the Federal Trade Commission (FTC).