A more thorough explanation:

Definition: A person who is a member of the clergy or a priest who is dedicated to serving the church.

Example: The bishop appointed a new ecclesiastic to lead the parish.

Explanation: In this example, the word "ecclesiastic" refers to a priest who has been chosen by the bishop to lead a particular church. This person is dedicated to serving the church and its members, and is responsible for carrying out various religious duties such as performing sacraments, leading worship services, and providing spiritual guidance to the congregation.