Think for a moment about the communities you’re a part of. Typically, our minds begin with geographic qualifiers and branch out. I’m a member of my local community, which can be described in the context of my city or my neighborhood. Distilling down to the neighborhood association sickens me — mine is run by rabid former hall monitors — but it certainly applies.
From there, we extend thoughts to groups with whom we share some common interest. Perhaps you consider your church/temple/synagogue, a professional association or even an alumni group or informal collection of high school or college friends a community to which you belong. For many of us, our next step is into the world of online communities. Maybe you join others on an online game from time to time, or have a collection of Facebook friends that don’t meet some pre-existing standard.