Consumerism is a social and economic order that encourages the purchase of goods and services in ever-greater amounts. The term is often associated with criticisms of consumption starting with Thorstein Veblen. Veblen's subject of examination, the newly emergent middle class arising at the turn of the twentieth century, comes to full fruition by the end of the twentieth century through the process of globalization.

Sometimes, the term "consumerism" is also used to refer to the consumerists movement, consumer protection or consumer activism, which seeks to protect and inform consumers by requiring such practices as honest packaging and advertising, product guarantees, and improved safety standards. In this sense it is a movement or a set of policies aimed at regulating the products, services, methods, and standards of manufacturers, sellers, and advertisers in the interests of the buyer.

In economics, consumerism refers to economic policies placing emphasis on consumption. In an abstract sense, it is the belief that the free choice of consumers should dictate the economic structure of a society (cf. Producerism, especially in the British sense of the term).