How do you use the word duty?

Answer 1

The word 'duty means :

Noun:

A moral or legal obligation; a responsibility: "it's my duty to uphold the law".

(of a visit or other undertaking) Done from a sense of moral obligation rather than for pleasure: "a fifteen-minute duty visit".

Answer 2

"Duty" refers to a moral or legal obligation to perform certain tasks or responsibilities. For example, military personnel have a duty to obey orders, and parents have a duty to care for their children. It can also be used in a broader sense to mean a task or job that needs to be done.