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science  (sciences plural )
1  n-uncount Science is the study of the nature and behaviour of natural things and the knowledge that we obtain about them. 
The best discoveries in science are very simple.  
2  n-count A science is a particular branch of science such as physics, chemistry, or biology. 
Physics is the best example of a science which has developed strong, abstract theories.  
3  n-count A science is the study of some aspect of human behaviour, for example sociology or anthropology. 
...the modern science of psychology.  
4 
  domestic science 
  exact science 
  Master of Science 
  political science 
  social science