A more thorough explanation:

Definition: A sacristan is a person who takes care of a church. They are also known as a sexton of a church.

Example: The sacristan is responsible for preparing the altar for mass, lighting candles, and ensuring that the church is clean and tidy.

Explanation: The example illustrates the duties of a sacristan. They are responsible for maintaining the church and ensuring that everything is in order for religious services. This includes preparing the altar, lighting candles, and keeping the church clean.