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English definition of “high”

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high

adjective uk   /haɪ/ us  

high adjective (DISTANCE)

A2 (especially of things that are not living) being a large distance from top to bottom or a long way above the ground, or having the stated distance from top to bottom: a high building/mountain high ceilings It's two and a half metres high and one metre wide. The corn grew waist-high (= as high as a person's waist) in the fields.
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high adjective (ABOVE AVERAGE)

B1 greater than the usual level or amount: The job demands a high level of concentration. He suffers from high blood pressure. Antique furniture fetches very high prices these days. She got very high marks in her geography exam. It's very dangerous to drive at high speed when the roads are wet. He's in a high-security prison.high in sth C1 containing a large quantity of something: I avoid foods that are high in fat.high standards/principles B1 very good or very moral standards: She was a woman of high principles. She demands very high standards from the people who work for her.high winds fast, strong wind: High winds caused delays on the ferries.
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high adjective (IMPORTANT)

B2 having power, an important position, or great influence: an officer of high rank
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high adjective (SOUND)

near or at the top of the range of sounds: I can't reach the high notes.

high adjective (BAD)

UK (of food) smelling bad and no longer good to eat: This meat is rather high - I'm going to throw it out.

high adjective (MENTAL STATE)

C2 not thinking or behaving normally because of taking drugs: He was high on heroin at the time.

high

noun uk   /haɪ/ us  

high noun (ABOVE AVERAGE)

[C] a higher level than has ever been reached previously: Interest rates have reached an all-time/record high.
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high noun (MENTAL STATE)

[C usually singular] a period of extreme excitement or happiness when you feel full of energy, often caused by a feeling of success, or by drugs or alcohol or a religious experience: Exercise gives you a high. She's been on a high ever since she got her article published in the Times. There are lots of highs and lows in this job.

high noun (EDUCATION)

[S] US informal for high school (when used in the name of a school): I go to Santa Ana High.

high

(Definition of high from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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