If the prefix ex-means outwhat is exact meaning of expulsion?

The prefix "ex-" in "expulsion" means "out" or "from," as you correctly noted.

So, expulsion means the act of forcing someone out of a place or group.

Here's a breakdown:

* ex-: out

* pulsion: the act of driving or pushing

Therefore, expulsion is literally "the act of driving or pushing someone out."