Definition of invocation noun from the Oxford Advanced American Dictionary

     

    invocation

     noun
    noun
    NAmE//ˌɪnvəˈkeɪʃn//
     
    [uncountable, countable]
     
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  1. 1(formal) the act of asking for help, from a god or from a person in authority; the act of referring to something or of calling for something to appear
  2. 2(computing) the act of making a particular function start
See the Oxford Advanced Learner's Dictionary entry: invocation