A macroculture is a dominant culture, the culture that dominates and shapes life across a large territory. It is seen as a unity, a culture that is based on shared values, norms, and a single language.
To illustrate this point, let us look at the United States. In the United States, the macroculture consists of common institutions, such as courts, government departments, and law enforcement agencies, that are available to everyone. The common language in the American macroculture is English, which is the official language of the United States.
A microculture exists within the larger population but differs from the macroculture considerably. For instance, in the United States, there are various Native American tribes that still maintain their own customs, rites, and traditions. These practices differ considerably from those of the dominant culture, which is generally derived from Protestantism.
Most of those who live in such a microculture also have a parallel existence in the macroculture. Someone from a Native American tribe may speak their traditional language at home, but when they engage with the macroculture, through work, for example, they will often adopt the dominant values, including the speaking of English. What this example illustrates is that macrocultures and microcultures are by no means mutually exclusive and that many people are able to live in both of them.