If you are through with something or if it is through, you have finished doing it.

If you are through with someone, you do not want to have anything to do with them again.

You can use through to indicate that something is moving directly from one side or end of a hole, opening, or pipe to the other.

You can use through when you are referring to cutting something in two pieces or making a hole in it.

You can use through to indicate travelling across or in a town, area, or country.

You can use through to indicate that a group of things or a mass of something is on either side of you or all around you.

You can use through to indicate getting from one side of a barrier or obstacle to the other.

You can use through to indicate that something goes into an object and comes out of the other side.

You can use through to indicate that something is moving around a system or passing from one end of it to the other.

You can use through to indicate that something happens or exists from the beginning of a period of time until the end.

You use through in expressions such as half-way through and all the way through to indicate to what extent an action or task is completed.

If something such as a proposal or idea goes through, it is accepted by people in authority and is made legal or official.

You can use through to indicate that someone has succeeded or won in an examination or a round of a competition.

When you get through while making a telephone call, the call is connected and you can speak to the person you are phoning.

You can use through to indicate that you have read something from beginning to end.

If you say that someone or something is wet through, you are emphasizing how wet they are.

To move through something such as a hole, opening, or pipe means to move directly from one side or end of it to the other.

To cut through something means to cut it in two pieces or to make a hole in it.

To go through a town, area, or country means to travel across it or in it.

If you move through a group of things or a mass of something, it is on either side of you or all around you.

To get through a barrier or obstacle means to get from one side of it to the other.

If a driver goes through a red light, they keep driving even though they should stop.

If something goes into an object and comes out of the other side, you can say that it passes through the object.

To go through a system means to move around it or to pass from one end of it to the other.

If you see, hear, or feel something through a particular thing, that thing is between you and the thing you can see, hear, or feel.

If something such as a feeling, attitude, or quality happens through an area, organization, or a person's body, it happens everywhere in it or affects all of it.

If something happens or exists through a period of time, it happens or exists from the beginning until the end.

If you go through a particular experience or event, you experience it, and if you behave in a particular way through it, you behave in that way while it is happening.

You use through in expressions such as half-way through and all the way through to indicate to what extent an action or task is completed.

If something happens because of something else, you can say that it happens through it.

You use through when stating the means by which a particular thing is achieved.

If you do something through someone else, they take the necessary action for you.

If something such as a proposal or idea goes through a parliament or an official review, it is accepted by people in authority and is made legal or official.

If someone gets through an examination or a round of a competition, they succeed or win.

If you look or go through a lot of things, you look at them or deal with them one after the other.

If you read through something, you read it from beginning to end.