the exclusive possession or control of the supply of or trade in a commodity or service

the state's monopoly of radio and television broadcasting

a board game in which players engage in simulated property and financial dealings using imitation money. It was invented in the US and introduced in 1933 by Charles Darrow; a forerunner of the game had been patented on 5 January 1904 as ‘The Landlord's Game’ by Elizabeth J. Magie