Definition of expulsion noun from the Oxford Advanced American Dictionary

     

    expulsion

     noun
    noun
    NAmE//ɪkˈspʌlʃn//
     
     
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  1. 1[uncountable, countable] expulsion (from…) the act of forcing someone to leave a place; the act of expelling someone These events led to the expulsion of senior diplomats from the country. Troops are engaged in the expulsion of enemy forces from the area.
  2. 2 [uncountable, countable] expulsion (from…) the act of sending someone away from a school or an organization, so that they can no longer attend it or belong to it; the act of expelling someone The principal threatened the three girls with expulsion. The team faces expulsion from the football league.
  3. 3[uncountable] expulsion (from…) (formal) the act of sending or driving a substance out of your body or a container the expulsion of air from the lungs
See the Oxford Advanced Learner's Dictionary entry: expulsion