A more thorough explanation:

Definition: Granatarius (gran-uh-tair-ee-uhs). [Law Latin] A person who is responsible for managing a granary, particularly one who is in charge of a religious institution's granary.

Examples:

• The granatarius of the monastery was responsible for ensuring that there was enough grain to feed the monks throughout the year.
• The granatarius of the castle was in charge of storing and distributing the grain to the soldiers during times of war.

These examples illustrate how a granatarius was responsible for managing a granary, which was an important resource for feeding people in both religious and military contexts. The granatarius had to ensure that there was enough grain stored to last through the year or a period of conflict, and they had to distribute it appropriately to those who needed it.