plural mailers
chiefly US
1
: a person or organization that mails something
a letter mailer
2
: a container used for mailing something
3
: something (such as an advertisement) that is sent by mail
Cite this Entry
“Mailer.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/mailer. Accessed 23 Jun. 2026.
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