A more thorough explanation:

Definition: An excommunicant is a person who has been excommunicated from a church or religious community. In other words, they have been officially expelled or banned from participating in the activities of that community.

Example: If someone is excommunicated from the Catholic Church, they are no longer allowed to receive the sacraments or participate in any church activities. They are considered an excommunicant.

Explanation: The example illustrates how someone can become an excommunicant by being expelled from a religious community. This can happen for a variety of reasons, such as violating church laws or teachings, or engaging in behavior that is considered immoral or unethical by the community. Being an excommunicant can have serious consequences, such as being denied access to religious rites or being shunned by other members of the community.