The document discusses definitions of open source communities. It notes that while Wikipedia defines a community as a group that interacts and shares things, there is no common definition of an open source community. The document raises questions about whether an open source community refers to free software versus open source, a single overall community, individual project communities, subgroups, or different roles like developers, users, and companies. It then provides a broad definition proposed by Dawn Foster of an open source community as a group of people interacting and sharing ideas, code, or documentation while working together on open source software in various capacities.