doctor on duty

doctor Noun

— A person who helps people who are sick, and looks after their health. — A person who can work very well about a particular thing and is given the title Doctor by a university, for example a doctor in psychology could be called Doctor John Smith.

doctor Verb

— If you doctor someone, you act as a medical doctor towards them. — If you doctor something or someone, you change them.

on Preposition

— positioned at the upper surface of, touching from above The apple is on the table. — at the date of Tim was born on the 4th of July. — along, forwards (continuing an action) drive on, rock on — about, dealing with the subject of I have a book on history. There was a World Summit on the Information Society a few weeks ago. — touching; hanging from I have no money on me at the moment. I would like to eat the fruit on the trees. — because of, due to He was arrested on suspicion of bribery. I contacted Joanne on a hunch that she would know about it. The stock price increased on news of a new product.

on Adjective

— If something is on, it is active, functioning or operating. The television is on. The lights are on, so it is very bright.

duty Noun

— A duty is something that you should do. Parents have the duty to educate their children. — A tax placed on imports or exports; a tariff, customs duty, excise duty. Import duty and taxes are due when importing goods into the United States.