A more thorough explanation:

Definition: An excommunicator is a person who excommunicates someone from a religious community or organization.

Example: The bishop was the excommunicator who expelled the member from the church for breaking the rules.

Explanation: In this example, the bishop is the excommunicator because he is the one who is responsible for expelling the member from the church. The term "excommunicator" is used to describe someone who has the authority to excommunicate others from a religious community or organization.

Example: The excommunicator in the cult was known for punishing members who questioned the leader's authority.

Explanation: In this example, the excommunicator is a member of a cult who punishes other members for questioning the leader's authority. This illustrates how the term "excommunicator" can be used to describe someone who uses their power to control and manipulate others within a religious organization.