Something that is high extends a long way from the bottom to the top when it is upright. You do not use high to describe people, animals, or plants.

You use high to talk or ask about how much something upright measures from the bottom to the top.

If something is high, it is a long way above the ground, above sea level, or above a person or thing.

You can use high to indicate that something is great in amount, degree, or intensity.

If a food or other substance is high in a particular ingredient, it contains a large amount of that ingredient.

If something reaches a high of a particular amount or degree, that is the greatest it has ever been.

If you say that something is a high priority or is high on your list, you mean that you consider it to be one of the most important things you have to do or deal with.

Someone who is high in a particular profession or society, or has a high position, has a very important position and has great authority and influence.

You can use high to describe something that is advanced or complex.

If you aim high, you try to obtain or to achieve the best that you can.

If someone has a high reputation, or people have a high opinion of them, people think they are very good in some way, for example at their work.

If the quality or standard of something is high, it is very good indeed.

If someone has high principles, they are morally good.

A high sound or voice is close to the top of a particular range of notes.

When a river is high, it contains much more water than usual.

If your spirits are high, you feel happy and excited.

If someone is high on drink or drugs, they are affected by the alcoholic drink or drugs they have taken.

A high is a feeling or mood of great excitement or happiness.

If you say that something came from on high, you mean that it came from a person or place of great authority.

If you say that you were left high and dry, you are emphasizing that you were left in a difficult situation and were unable to do anything about it.

If you refer to the highs and lows of someone's life or career, you are referring to both the successful or happy times, and the unsuccessful or bad times.

If you say that you looked high and low for something, you are emphasizing that you looked for it in every place that you could think of.