The document discusses different perspectives for defining community:
1. The systems perspective views a community as similar to a living organism with different parts representing specialized functions that work together to meet community needs.
2. The social perspective defines a community by the social and political networks that link individuals and organizations, understanding which is important for engagement efforts.
3. The virtual perspective recognizes that some communities exist online through computer-mediated communication and social media, forming virtual communities.
4. The individual perspective acknowledges that people may identify with multiple communities and that this sense of identity can change over time. Practitioners must understand how individuals view themselves and their connections.