Clear means you can see easily because there is nothing blocking your sight. It is often used when talking about light or things like glass or water.
The water is clear and clean.
The sky is clear after the rain.
Clear can also mean easy to understand or not confusing. We use it when something is simple and obvious for people to know or learn.
The instructions are clear and simple.
It is clear what you need to do.
When someone is clear about something, they are sure and have no doubt. It means their mind or decision is certain without confusion.
I am clear that I will help you.
She made a clear decision yesterday.
Clear as a verb means to take away things that are in the way or to make a place empty and free. You can clear objects, snow, or space.
Please clear the table after dinner.
They cleared snow from the road.
To clear can mean to give official permission or to allow someone to do something after checking it is safe or correct. It is used in airports or security.
The pilot cleared the runway to take off.
He cleared customs quickly at the airport.
Clear means there is nothing in a place or space. It is empty and free for use or movement.
The street was clear of cars.
The desk is clear for your work.