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Meaning of junk mailer in English:

junk mailer

Pronunciation /ˈdʒʌŋk ˌmeɪlə/

noun

North American

  • A distributor of circulars, advertisements, etc., by post to a large number of postal addresses. In later use also: a sender of unwanted or unsolicited email, typically in the form of advertising or promotional material sent to multiple recipients.

Origin

1950s. From junk + mailer, after junk mail.