Crowd
The social pressure of the situation — what others want of you.
A crowd in a dream is the dictionary's image of social pressure. Being moved by a crowd you did not choose to be in is the dictionary's image of a phase of life where the direction has been set by other people's expectations more than your own.
Standing still in a moving crowd is the dictionary's image of refusing to be carried along — usually the dream's positive reading on a phase where the dreamer is starting to choose their own pace.
A welcoming crowd at an event is the dictionary's image of recognition — community received.
Where you often see it. A crowded street. A crowd at an event you do not remember coming to. Being pushed by people you cannot see. The dream uses the crowd for the social pressure of the situation — what others want from you.
What it is not. A crowd is not necessarily a sign of community. Often it is the opposite — the absence of intimate company.
Related in the dictionary. Read crowd with stranger, noise, and any scene where you cannot find anyone you actually know.