Expulsion
In short
Expulsion is the act of forcing someone to leave an organisation, school, or country permanently.
In plain words
It happens when someone breaks important rules. The person is kicked out and is usually not allowed to come back. This is a much stronger punishment than a simple warning.
A simple example
A student is expelled from university after being caught stealing expensive laboratory equipment. They are banned from all campus buildings and cannot finish their degree there.
Why it matters
It serves as a final way to protect a group from harmful behaviour. It maintains order and ensures that rules are taken seriously by everyone involved.
Easy to mix up
It is often confused with suspension, which is only a temporary removal from a group.