Use 'high' to say something is far above the ground or low place. This is a physical description of height.
The tree is very high.
The airplane flies high in sky.
'High' is used when something is at or near the top part of another thing, like floors in a building or shelves.
The painting is on the high shelf.
He lives in the high floors.
'High' can describe a strong happy or excited feeling people have after something good happens.
She was high after winning the game.
He felt high after the good news.
'High' means something costs a lot of money or has a large value in money or data.
The shoes are very high in price.
Gas prices are high today.
'High' describes something that is above the usual or average amount, like risk or energy level.
The risk is high in winter.
The battery is at a high level.
'High' as a noun means the feeling or state a person has after taking drugs or feeling very excited.
He feels a high after smoking.
The drug causes a strong high.
'High' can describe how something moves or is placed, meaning far above a base level or position.
The ball flew high in air.
He held his hand high.