Definition of hard science noun from the Oxford Advanced Learner's Dictionary

     

    hard science

     noun
    noun
    BrE
     
    ; NAmE
     
     
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  1. 1[uncountable] science that is based on the objective measurement and observation of physical facts or events
  2. 2[countable] a science that involves the objective measurement and observation of physical facts or events, such as physics and chemistry
See the Oxford Advanced American Dictionary entry: hard science