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

mailer

noun
 
/ˈmeɪlə(r)/
 
/ˈmeɪlər/
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  1. (especially North American English) a person or company that sends a letter or package by post
    • I've been overwhelmed by leaflets from mailers.
  2. (especially North American English)
    (also mailing British and North American English)
    a letter or package that is sent by mail, especially one that is sent to a large number of people
  3. (North American English) an envelope, box, etc. for sending small things by mail
  4. (computing) a program that sends messages by email
    • The mailer manages the email delivery process.
    Topics Phones, email and the internetc2, Computersc2
See mailer in the Oxford Advanced American Dictionary

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