The New World Order, or NWO, is about a secret group of world leaders—particularly powerful individuals and corporations—are working behind the scenes to impose their own world order. Theres lots of ways to explain this with different definitions but their mostly similar.
These elites and their global cabal of associates want to establish a single, unified world government in which they hold sole power and authority.The elite's ultimate goal is to control and rule humanity, often through tyrannical means by brainwashing them and using the matrix system. It is a new social or political regime or system designed to replace the current order, and supposed to give the elites even more power than the they currently do.
This one world government would be the ultimate form of control, where a small group of people have absolute power over the rest of the world. A lot of people argue that the elites are already well on their way to establishing it and i think the same.