Definition of high noun from the Oxford Advanced American Dictionary

     

    high

     noun
    noun
    NAmE//haɪ//
     
     
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    level/number
  1. 1the highest level or number Profits reached an all-time high last year.
  2. weather
  3. 2 an area of high air pressure; an anticyclone A high over southern California is bringing fine, sunny weather to all parts.
  4. 3 the highest temperature reached during a particular day, week, etc. Highs today will be in the region of 75°F.
  5. from drugs
  6. 4(informal) the feeling of extreme pleasure and excitement that someone gets after taking some types of drugs The high lasted all night.
  7. from success/enjoyment
  8. 5(informal) the feeling of extreme pleasure and excitement that someone gets from doing something enjoyable or being successful at something He was on a real high after winning the competition. the highs and lows of her acting career
  9. school
  10. 6used in the name of a high school He graduated from Little Rock High in 1982.
  11. Word Familyhigh adjective noun adverbhighly adverbheight nounheighten verbhigh adjective noun adverbhighly adverbheight nounheighten verbIdioms
    1. 1(formal) in a high place We gazed down into the valley from on high.
    2. 2(humorous) the people in senior positions in an organization An order came down from on high that lunchbreaks were to be half an hour and no longer.
    3. 3in heaven The disaster was seen as a judgment from on high.
See the Oxford Advanced Learner's Dictionary entry: high