Something that is clear is easy to understand, see, or hear.

Something that is clear is obvious and impossible to be mistaken about.

If you are clear about something, you understand it completely.

If your mind or your way of thinking is clear, you are able to think sensibly and reasonably, and you are not affected by confusion or by a drug such as alcohol.

To clear your mind or your head means to free it from confused thoughts or from the effects of a drug such as alcohol.

A clear substance is one which you can see through and which has no colour, like clean water.

A clear colour is bright and strong.

If a surface, place, or view is clear, it is free of unwanted objects or obstacles.

When you clear an area or place or clear something from it, you remove things from it that you do not want to be there.

If something or someone clears the way or the path for something to happen, they make it possible.

If it is a clear day or if the sky is clear, there is no mist, rain, or cloud.

When fog or mist clears, it gradually disappears.

Clear eyes look healthy, attractive, and shining.

If your skin is clear, it is healthy and free from spots.

If you say that your conscience is clear, you mean you do not think you have done anything wrong.

If something or someone is clear of something else, it is not touching it or is a safe distance away from it.

If you drive clear to a place, especially a place that is far away, you go all the way there without delays.

If an animal or person clears an object or clears a certain height, they jump over the object, or over something that height, without touching it.

When a bank clears a cheque or when a cheque clears, the bank agrees to pay the sum of money mentioned on it.

If a course of action is cleared, people in authority give permission for it to happen.

If someone is cleared, they are proved to be not guilty of a crime or mistake.

You can say 'Is that clear?' or 'Do I make myself clear?' after you have told someone your wishes or instructions, to make sure that they have understood you, and to emphasize your authority.

If someone is in the clear, they are not in danger, or are not blamed or suspected of anything.

If you make something clear, you say something in a way that makes it impossible for there to be any doubt about your meaning, wishes, or intentions.

If something or someone is a certain amount clear of a competitor, they are that amount ahead of them in a competition or race.

If you steer clear or stay clear of someone or something, you avoid them.