on duty
Actively engaged in an assigned task, duty or occupation.
I'm supposed to go on duty at 0800 hours.
He was seen drinking on duty.
She will be on duty from noon to six.
on duty
Alternative spelling of on duty
on-duty
We have collected all the wagons in our power, and sent over. Our people have had extreme hard duty; the common guards, common fatigue, and the extraordinary guards and extraordinary fatigue, for the removal of the stores, and forwarding the provisions, have kept every man on duty. Nathanael Greene
The Commander in Chief earnestly recommends that the troops not on duty should universally attend with that seriousness of Deportment and gratitude of Heart which the recognition of such reiterated and astonishing interpositions of Providence demand of us. George Washington
Sergeant Colon of the Ankh-Morpork City Guard was on duty. He was guarding the Brass Bridge, the main link between Ankh and Morpork. From theft. When it came to crime prevention, Sergeant Colon found it safest to think big. Terry Pratchett
But clearly the fact that we've gone from zero Iraqi security forces on duty in May to up to 200,000 today is an enormous accomplishment, but it's not enough. John Abizaid
Even as she lay dreaming these dreams, however, a sane part of her mind was still on duty. Realistically, she knew that what she was thinking was nonsense. Gordon R. Dickson
There are 40,000 Iraqi police on duty around the country. If they detect an attack about to happen, the police are the ones who are supposed to stop it. Paul Bremer