A more thorough explanation:

A supervisor is a person who has authority over others and is responsible for managing or overseeing them. This can include hiring, firing, promoting, disciplining, and handling grievances of other employees.

For example, a supervisor in a restaurant might be responsible for hiring new servers, training them, and making sure they follow the restaurant's policies and procedures. They might also be responsible for scheduling shifts, handling customer complaints, and managing inventory.

Another example of a supervisor is the chief administrative officer of a town or county. This person is responsible for overseeing the day-to-day operations of the town or county, including managing budgets, implementing policies and procedures, and ensuring that services are provided to residents.

Overall, a supervisor is someone who has the authority and responsibility to manage and oversee others, whether it's in a business, government, or other organization.