Definition of placeholder noun from the Oxford Advanced American Dictionary

     

    placeholder

     noun
    noun
    NAmE//ˈpleɪsˌhoʊldər//
     
     
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  1. 1(technology) a symbol or piece of text that replaces something that is missing
  2. 2 (linguistics) an item that is necessary in a sentence, but does not have real meaning, for example the word “it” in “It's a pity she left.”
See the Oxford Advanced Learner's Dictionary entry: placeholder