Definition of hemisphere noun from the Oxford Advanced American Dictionary

     

    hemisphere

     noun
    noun
    NAmE//ˈhɛməˌsfɪr//
     
     
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  1. 1one half of the earth, especially the half above or below the equator the northern/southern hemisphere
  2. 2either half of the brain the left/right cerebral hemisphere
  3. 3one half of a sphere (= a round solid object)
See the Oxford Advanced Learner's Dictionary entry: hemisphere