A more thorough explanation:

Definition: A ministrant is someone who ministers or dispenses. In historical ecclesiastical law, it refers to a party who cross-examines a witness.

• A priest who administers the sacraments is a ministrant.
• A nurse who dispenses medication is also a ministrant.
• In a court of law, the lawyer who cross-examines a witness is the ministrant.

These examples illustrate how a ministrant is someone who performs a service or function, whether it be in a religious, medical, or legal context. They are responsible for dispensing or administering something, whether it be sacraments, medication, or questioning a witness.