surveillance over exchange arrangements

surveillance

— noun close observation of a person or group (usually by the police)

over Preposition

— Something is over when it has finished, usually referring to an event. When the movie was over we left the movie theater. — In a location above something. He stepped over the dog. — From one side to the other. They went over the bridge. — If you invite someone over, you invite them to your house. They had him over for tea. — A number divided by another. Eight over two is four.

over Noun

— An over in a cricket match is six balls bowled from one end. The captain told me I would have to bowl the next over.

exchange Verb

— Two people exchange two things when each person gives a thing to the other person. They can exchange two things, or they can exchange a thing for money. The children can exchange toys so that each child has a new toy to play with.

exchange Noun

— An exchange is the act of exchanging. I did well in that exchange. Now I have three good new books, and I only paid a little money.

arrangement Noun

— Arrangement is the manner of being arranged. The arrangement of furniture in the office was important for getting things done efficiently. — An arrangement is a collection of things that have been arranged. In the vase was a beautiful flower arrangement. — An arrangement is a plans for some activity. We made arrangements to meet after work. — An arrangement is an agreement. We came to an arrangement about who would wash the dishes. — An arrangement is an adaptation of a piece of music. wrote a piano arrangement of an English folk song called "Country Gardens"