Pronunciation: /ɒn ˈdjuː.ti/
adjective describing the state of being engaged in work or official responsibilities
A1 The security guard is on duty at the entrance.
A2 The nurse on duty is taking care of the patients in the hospital.
B1 The police officer on duty responded quickly to the emergency call.
B2 The pilot on duty ensured a smooth and safe flight for all passengers.
C1 The CEO on duty made important decisions that shaped the company's future.
C2 The lead surgeon on duty successfully performed a complex operation with precision.
preposition indicating the location or position of being engaged in work or official responsibilities
A1 The security guard is on duty at the entrance.
A2 The nurse will be on duty all night at the hospital.
B1 The police officer was on duty when the crime occurred.
B2 The pilot must remain alert while on duty in the cockpit.
C1 The firefighter on duty quickly responded to the emergency call.
C2 The doctor on duty performed a life-saving surgery without hesitation.
formal The police officer is on duty tonight patrolling the streets.
informal I saw the security guard on duty at the mall yesterday.
slang My friend who's a nurse is on duty at the hospital today.
figurative As a parent, you are always on duty when it comes to taking care of your children.
was on duty
are on duty
more on duty
most on duty
is on duty
will be on duty
has been on duty
is being on duty
is on duty
on duty
to be on duty
being on duty
on duty