Definition of impulsion noun from the Oxford Advanced Learner's Dictionary

     

    impulsion

     noun
    noun
    BrE BrE//ɪmˈpʌlʃn//
     
    ; NAmE NAmE//ɪmˈpʌlʃn//
     
    (formal)
     
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  1. 1[countable] a strong desire to do something
  2. 2[uncountable] a reason for doing something Lack of food and water provided much of the impulsion for their speed.
  3. Word Origin late Middle English (in the sense ‘the action or an instance of impelling’): via Old French from Latin impulsio(n-), from the verb impellere, from in- ‘towards’ + pellere ‘to drive’.
See the Oxford Advanced American Dictionary entry: impulsion