Generally speaking, a crowd is defined as a group of people that have gathered for a common purpose or intent such as at a demonstration, a sports event, or during looting, or may simply be made up of many people going about their business in a busy area.

What does in the crowd mean?

or in crowd

a small, exclusive group of people who are perceived as fashionable or influential: She desperately wanted to be part of the in-crowd.

What does one of the crowd mean?

: ordinary people : people who are not viewed or treated as special or unusual kids trying to distinguish themselves from the crowd She prefers to be one of the crowd.