An intentional community is a voluntary residential community which is designed to have a high degree of social cohesion and teamwork. The members of an intentional community typically hold a common social, political, religious, or spiritual vision, and typically share responsibilities and property. This way of life is sometimes characterized as an "alternative lifestyle". Intentional communities can be seen as social experiments or communal experiments. The multitude of intentional communities includes collective households, cohousing communities, coliving, ecovillages, monasteries, survivalist retreats, kibbutzim, Hutterites, ashrams, and housing cooperatives.

An alternative lifestyle is a lifestyle perceived to be outside the norm for a given culture. The phrase "alternative lifestyle" is often used pejoratively. Description of a related set of activities as alternative is a defining aspect of certain subcultures.