Large, for-profit corporations collectively, understood as having significant economic, political, or social influence.
A situation, by legal privilege or other agreement, in which solely one party (company, cartel etc.) exclusively provides a particular product or service, dominating that market and generally exerting powerful control over it.
An exclusive control over the trade or production of a commodity or service through exclusive possession.
The market thus controlled.
The privilege granting the exclusive right to exert such control.
The holder (person, company or other) of such market domination in one of the above manners.