Definition of mailing noun from the Oxford Advanced American Dictionary

     

    mailing

     noun
    noun
    NAmE//ˈmeɪlɪŋ//
     
     
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  1. 1[uncountable] the act of sending items by mail The strike has delayed the mailing of tax reminders. a mailing address
  2. 2(also mailer) [countable] a letter or package that is sent by mail, especially one that is sent to a large number of people An order form is included in the mailing.
See the Oxford Advanced Learner's Dictionary entry: mailing