A group of people living in the same locality and under the same government. The district or locality in which such a group lives. A group of people having common interests: the scientific community; the international business community. A group viewed as forming a distinct segment of society: the gay community; the community of color. Similarity or identity: a community of interests. Sharing, participation, and fellowship. Society as a whole; the public. Ecology A group of plants and animals living and interacting with one another in a specific region under relatively similar environmental conditions. Ecology The region occupied by a group of interacting organisms.