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n.
a form of trustworthiness; the trait of being answerable to someone for something or being responsible for one's conduct; "he holds a position of great responsibility"
n.
the social force that binds you to the courses of action demanded by that force; "we must instill a sense of duty in our children"; "every right implies a responsibility; every opportunity, an obligation; every possession, a duty"- John D.Rockefeller Jr
n.
the actions and activities assigned to or required or expected of a person or group; "the function of a teacher"; "the government must do its part"; "play its role"
n.
(with `in') guardianship over; in divorce cases it is the right to house and care for and discipline a child; "my fate is in your hands"; "too much power in the president's hands"; "your guests are now in my custody"; "the mother was awarded custody of the children"