Common meaning:

When everyone is accepted as part of the group.

Hidden meaning of the Equity religion: 

When the oppressed have been accepted as part of the group and the oppressive people have been removed. 

Discussion:

Some people think that belonging includes everybody, but true Equity believers know that belonging is only for people who are part of oppressed groups. This is why more and more spaces are being segregated and only allow members of victim groups to be present.

The desire for all humans to belong to something is very strong and Liberalism supports this need by declaring that no one is to be excluded for any reason. Equity disagrees and says that only those who are oppressed can belong and the rest must be removed.

Equity believers seem to think that two wrongs make a right. If members of an oppressed group were not allowed to belong in the past then it is fine to exclude people from oppressor groups today.

The excuse that Equityists use to cover their inhuman treatment of people from groups they have labeled as oppressive, is that they have lots of other places they can go. In reality, all this is really about is revenge: They treated us badly in the past so we are going to get them back now.