turn a gun on

turn Verb

— To face a different direction The car turned the corner and went north. Walk down the street and turn left at the lights. The dancers turned round and around. — If something turns a certain way, it becomes that way. The sky turned dark and cloudy. The game turned into a fight.

a Determinative

— A is used when the following word could be any of a certain type. Compare "A book I saw on the shelf" and "The book I gave you yesterday".

a Noun

— A is the first letter of the alphabet. The letter "a" comes before "b". — In some schools, an A is a very high grade. Ron got an A on his earth science test.

gun Noun

— A gun is a weapon that sends bullets through its metal tube.

gun Verb

— To make an engine work fast by opening its throttle. I gunned the engine and passed his car. — If someone is gunned down, they are shot by something, usually a gun. He was gunned down by a hitman.

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.