To be positioned round a place or object means to surround it or be on all sides of it. To move round a place means to go along its edge, back to the point where you started.

If you move round a corner or obstacle, you move to the other side of it. If you look round a corner or obstacle, you look to see what is on the other side.

You use round to say that something happens in or relates to different parts of a place, or is near a place.

If a wheel or object spins round, it turns on its axis.

If you turn round, you turn so that you are facing or going in the opposite direction.

If you move things round, you move them so they are in different places.

If you hand or pass something round, it is passed from person to person in a group.

If you go round to someone's house, you visit them.

You use round in informal expressions such as sit round or hang round when you are saying that someone is spending time in a place and is not doing anything very important.

If something is built or based round a particular idea, that idea is the basis for it.

If you get round a problem or difficulty, you find a way of dealing with it.

If you win someone round, or if they come round, they change their mind about something and start agreeing with you.

You use round in expressions such as this time round or to come round when you are describing something that has happened before or things that happen regularly.

You can use round to give the measurement of the outside of something that is shaped like a circle or a cylinder.

You use round in front of times or amounts to indicate that they are approximate.

In spoken English, round about means approximately.

You say all round to emphasize that something affects all parts of a situation or all members of a group.

If you say that something is going round and round in your head, you mean that you can't stop thinking about it.

If something happens all year round, it happens throughout the year.