duty-n; 4 Senses

Sense Number 1: a moral responsibility or state of obligation

Commentary: DUTY[+state][+relation][+social][+obligation][+moral]

It is our duty to uphold the law.
He instilled a strong sense of civic duty in his children.
They have not done their duty as responsible citizens.

WordNet 3.0 Sense Numbers: 2

Sense Number 2: required tasks, regular work demands

Commentary: DUTY[+activity][+regular][+task][+required]

Writing the annual financial report is a main duty of the company's chief financial officer.
He finished a second tour of duty in Iraq.
She is stressed by all her new duties at work.
The new nurse should report for duty at 6 am sharp.
Appearing at the gala is one of the Queen's official duties.

WordNet 3.0 Sense Numbers: 1

Sense Number 3: a government tax on imports/exports

Commentary: DUTY[+quantity][+money][+tax][+government][+import_export]

The duties on this foreign sports car make it prohibitively expensive.
There is no duty on any merchandise bought in these duty-free shops at the airport.

WordNet 3.0 Sense Numbers: 3

Sense Number 4: a state of operational utility of a thing

Commentary: DUTY[+state][+operational][+utility][+of_entity]

We got double duty out of that trip to New York.
'making the word do the duty for the thing' (Edward Sapir)
What is the duty cycle of this machine?

WordNet 0.0 Sense Numbers: 5