duty
/ˈduːti/ /Brit ˈdjuːti/
noun
plural -ties
something that is done as part of a job [count]
synonyms see1task</SYNR
something that you must do because it is morally right or because the law requires it [count]
[noncount] :active military service
a tax on goods that are being brought into a country [count]
do duty as
to do the work of (someone or something)
to be used as (something)
off duty
not working at a particular time
on duty
working at a particular time