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



    BrE BrE//ˌɪnvəˈkeɪʃn//
    ; NAmE 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
  3. Word Originlate Middle English: via Old French from Latin invocatio(n-), from the verb invocare, from in- ‘upon’ + vocare ‘to call’.
See the Oxford Advanced American Dictionary entry: invocation